BMW Misfire/ Rough Idle M54 6 Cylinder Low Compression
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- čas přidán 23. 01. 2014
- Does your M54 BMW engine have a misfire/ low compression ? Don't be quick to replace the engine. Please try this first before that is done. Could save you $1000's !!! Please Read Below !!!
How this is done: Remove the Coil then the spark plug. After they are ALL out, we pour 1 ounce of fluid into each cylinder. Then I reinstall the spark plugs and let the car sit overnight. The next day you want to remove all the spark plugs again. Place a heavy towel over the valve cover so that all the spark plugs holes are covered. Proceed to crank the motor over using the key. Do this 4 separate times for 10 secs each time. Reinstall all the spark plugs and torque to spec. Reinstall all the coils and connect harness. If you were planning to replace the spark plugs ( Which I recommend ) I would wait till all the cleaning chemical is burned out of the cylinder. Start the car and vary the rpm for 1 minute between 1000 RPM and 3500 Rpm. if the engine seems like it is not clearing out or running rough after the 1 minute. Turn the engine off and restart. After the 1 minute has been completed, then run the engine @ 3500 rpm for 5 minutes ( Pending that there are no other issues with the engine) After that an extensive test drive on the freeway is recommended ( 15-20 miles). This chemical is strong and not healthy to breath so lots of outdoor space and fans to blow the exhaust fumes away is recommended. After all is completed then reinstall the cover over valve cover. Depending on the mileage and time car has been driven in this state, it could take multiple tries to resolve issue. Also it is good to have car diagnosed as a low compression issue before performing this repair, since many other issues can mimic this symptom. Hope this helps!! - Auta a dopravní prostředky
This is the best explanation of the cold start problem for the 325/330 m54 motors. The explanation makes sense to why the problem is worse on really cold morning.
I did this and it worked for my 2003 e39 530i!
Prior to, my car was running fine with 160k miles then one chilly day wouldn't start. No warning, no smoke or misfires. Would crank but no start. Thru no codes.
Had fuel, spark. Changed the OEM intake cam pos & crankshaft sensor no luck. Had car towed to mechanic where he found low compression across all cylinders. He also noticed heavy carbon build up on top of pistons. At this point he suggested buying another e39 or replacing the engine. Thats when I came across this video and decided to take a closer look and had car towed back home. I removed the plugs and soaked all the pistons overnight. After removing the injection cleaner with a shop vac I then added a teaspoon of motor oil to each piston. I then perfomed another compression test. Numbers increased dramatically on all cylinders! Re-installed plugs and car fired right up! Thanks for sharing this video! For the cleaner I used BMW's "Fuel injection and induction system cleaner concentrate" part # 82140428376. Same stuff as AC delco.
I want to thank you for making this video!! I definitely was going to throw in the towel on my 335i but after I did this it works like a charm!! Thanks again!👍🏾
instablaster.
I just did this on my 2005 330i ZHP with almost 180,000 miles on it and it worked! It was idling very rough and I was like, "Seriously?!?! I've got new plugs and new coils on it, changed the valve cover gasket, intake boots, yada yada yada. Saw this video, pulled out the plugs and dropped some Lucas Fuel Injector cleaner in there and let it sit over night. The next day, I blew out 'some' of the piston holes, put in the plugs and coils back on and fired it up. BOY DID IT SMOKE! But it was the prettiest sounding smoky engine ever! Thank you so much guys!
franksavageryan Your welcome Bud, Glad we could help
+Escondido German Auto
Hi, are the fuel additives that you pour directly into the tank any good in this situation?
+franksavageryan thanks looking for something like this, will try this soon! would seafoam work better?
elinson villar did u do this for your car. how do you get it out?
what do you mean by blowing out?
thank you, this really works. my #2 cylinder had a missfire. I tried everything from checking for leaks to replacing my coils , spark plugs and even fuel injector. i did exactly what you said except for that i used lucas fuel injector cleaner. i let that sit overnight and in the morning my car was running like a champ. thanks for posting this up.
Rey Guzman when u did that did u take the plug out then pour it in the hole? How how did you clean the fuel injecton cleaner out or did it just burn off
clenead holes of spark?
You just saved me so much time I was about to pull the head and came across this video 👍
Same here man. I was so close, Wow. Just changed my valve cover gasket thinking that was the problem. Fuel filter and oil filter housing gasket. Spark plugs and coils. Still had issues. I tried this and good.
The ccv makes these dirty burners, i have been deleting the ccv, i have watched this video earlier this year and this will fix alot of toyota celica's with the stuck ring problem, good video !!!
Nathan's DIY Garage I poured some Lucas Upper Cylinder Lubricant with injector cleaner in my cylinders. Misfire went away for a bit. Then I went to start the car up not to long ago and it seems like the misfire has returned a little. Should I do another small treatment of lucus?
@@SodaTartsBaezFord Hi Nathan, what was the outcome of your issue here. Thanks- (sub to your channel).
Thank God for you guys and this video..Had random misfire cylinder 3 that I couldn't figure out. After months of trying to figure it out I though I might have had a lazy lifter being that it only affected cylinder 3 at cold start would misfire and would have to reset the trouble code most days after initial
starting. Would run ok after a couple minutes. THIS PROCESS FIXED MY PROBLEM !!!! NICE SMOOTH STARTS. THANK YOU SO MUCH..
Fantastic! I was ready to buy a used engine for my 2001 E46 when I came across your video. I had a consistent misfire on cylinder 6 with almost no compression. Compression is almost back to normal after a couple of overnight soaks. Saved me $$$ and lots of time and effort. Thank you for posting! :-)
Dov Katz why did u end up doing it more than once?
What codes were u getting. P1353 p0313?
IT WORKED!! Thank you, thank you, thank you!
Dusty, watched your guys video and it was spot on. My sons 02 BMW 325xi was misfiring horribly. It has 170,000 miles on it and was consuming terribly...like a quart every couple weeks. It threw some codes and we had them checked at O'Reilly Auto. Cylinders #2 and #4 were misfiring. Started looking for some insight and found your post. Bought the AC Delco 6xxp cleaner off of Amazon for $15.98 and 6 new NGK Platinum plugs for about $50 (like $8 apiece). Took about 15 minutes to get everything taken apart to get to the cylinders and then poured the cleaner into all six cylinders. Let the stuff do its magic overnight (7-8 hours). In the morning I then covered the engine compartment with rags and turned the motor over until I couldn't see anymore fluid shooting out of the cylinders. The carbon build up was unbelievable. Little pieces shot out of the cylinders all over the engine compartment. The old plugs were absolutely horrible. I wiped everything down. Cleaned the ports out and blew all particles out of the area around the cylinders. I put the new plugs in and started that baby up. She blew white smoke for about 10-15 minutes. Took it out and ran it for about 30 minutes to really heat it up and burnt that stuff out. The engine is running awesome now. I changed the oil for good measure and am hoping this may help the oil consumption too. I can't thank you and your garage for making this post. All told I spent less than $70 and the car is running like new. Thanks!
+Matthew Masters Thanks Matthew!! Glad we could help
Just a heads up, the excessive oil consumption is caused by a clogged or faulty ccv system usually especially at higher milage.
twade8669
What will a damaged or bad ccv look like ?
Can you please clarify. you remove the spark plug. pour 1-2 oz of the clearner in the hole when the spark plug goes...my question is When you started the car in the morning, are the spark plugs in the car or out of the car ?
I just read the description! What is the purpose of the heavy towel?
Thanks for showing us this clever and easy fix. I'm going to get some of that cleaner. In 2005, I bought a 2001 525i that was using 1gt of oil in 1000 miles (at 70,000 miles ). And I was bummed. Well, two AutoRX treatments cleared it up and the oil consumption went to 1qt in 4500 miles. If you still have a running engine, you might try it. These engines suffered from BMW's first attempt at extended oil changes. The system was set for an oil service at 15,000 mile intervals which was way too long. When I changed the oil for the first time, the filter was full of sludge and black carbon chunks due to this crazy service interval. Anyway, I kept the car for 15 years and put another 100,000 miles on it. It was still running great when I sold it a couple of years ago. I miss it. The e39 was BMW's best 5'er.
excellent info.. honest mechanic! I had similar issue... but it's easier for mechanics to say your engine fucked! meanwhile oil level wasn't even right.. thanx to this VID that saved me R17000.
great job mate! 😉
I did this to and it worked , you can use lucas injector cleaner too, the ccv is usually to blame for putting oil back into everything, i did a ccv delete video if anyone is interested the video is on my channel.
Im going to your channel now. You thin a Catch can is better. I heard if you live in a cold climate, you will have to drain every so often due to moisture buildup in the can.. How has it performed for you?
I poured some Lucas Upper Cylinder Lubricant with injector cleaner in my cylinders. Misfire went away for a bit. Then I went to start the car up not to long ago and it seems like the misfire has returned a little. Should I do another small treatment of lucus?
What if the pistons our lower in a few cylinder do i leave it like tgat and just por it in
Thanks, I have the same problem in the same cylinder. Will definitely try this before I even attempt to crack open the engine
IM NOT THE TYPE TO COMMENT BUT GOD BLESS THIS MANZ SOUL. E46 325i WAS LOW ON COMPRESSION ON THE 5th CYLINDER TOOK IT TO A SHOP TOLD ME BrOKEN PISTON... I WAS LIKE NO WAY .. SO I DID SOME RESEARCH SEEN THIS VIDEO AND WENT TO EBAY TO BUY THE BOTTLE FOR 150$.BEST 150 I EVER SPENT
thank you for uploading, I think this is what I need to try but first I'm going to perform a comp test then if I end up zero I will pull out my leak down thanks.
It does work I uses Chevron with Techron fuel injector cleaner and it is cheaper.
Thank you guys for the info.
Peace brother!!
Had a 94 honda civic someone had done an engine swap on. idled rough but seemed to run ok. blew blue smoke out the exhaust while driving. didnt feel like it had a ton of power but ehh it was a 1.6L 4 cylinder. I did something similar to this just with seafoam (or you can use diesel fuel, same thing basically) and marvel mystery oil. Let the seafoam sit in all the cylinders overnight. came back the next morning and found all but one cylinder was empty. so I turned the engine over with the starter (plugs still out) to blow the rest of the seafoam out. then poured some marvel mystery oil over in the cylinders. let it sit for a few hours. same thing cranked it over to remove any left over mm. Changed the oil cause keep in mind all this stuff is now in the oil thinning it out a lot. Threw the plugs in and took it for a drive up the road. at this point the gunk in the rings may still be there just softened so its important to really get those rings moving around to knock all the soft gunk completely loose and out. So beat the heck out of it. WOT to red line everywhere for about 5-10 minutes (best to do this on a country road). The car will smoke like a mad house for a good bit of that. The civic in question stopped smoking blue out the exhaust while driving and had gobs more power. No long felt like a whimpy 4 cylinder. I wish I had check compression before and after but it had to make a killer difference with how much more power the car had. Would burn tire easily through 1st gear now.
Can I use liqimolley engine flush instead of this ac delco
Doesnt the liquid go in the engine and mixes with oil if the rings are stuck?
i have e60 m54 530i changed pcv valve engine still using up oil (no leaks). possible stuck oil rings i can see spark plugs are in bad condition due to burning oil. havent done leak down test but will give this a go first i think.
What's the easiest way to cut fuel injection for the comperssion test?
A very interesting discovery indeed. I would imagine that this condition is most prevalent in cylinders 3 and 4 since these cylinders scavenge the bulk of oil vapors from the CCV system. I would suggest jacking the right side of the car in order to get the cylinder bores perpendicular to the ground. You want to ensure that the solvent gets access to the entire circumference of the ringland. I think that I will be making this part of a 100,000 mile tune up regimen. Thanx for sharing.
Jack the car right side or left side?
Interesting that 3 and 4 get the bulk of ccv. I'd imagine it is because they go up and down at the same time? They are on different strokes though. Please elaborate on your discovery.
@@andrewyear81 I sold my M54 BMW a few years ago. I don't even remember responding here. I DO remember spending a shit ton of time learning about the M52TUB and M54 engines. If it made sense to me back then, it's because it made sense.
dude you help me so much thanks
Ikr mee too .. ///m3 ran like shit
tried it on a 05 x3 and it worked (verbatim), appreciate the tip.
Can I use liquimoly valve clean or liquimoly injection cleaner instead of this into my 3rd cylinder no compression civic turbo 2018?
BMW e46 322i having a misfire fault code is it firing order or location of the cylinder, s many thanks
my bmw 325i 2002 model is sometimes producing a spark on cylinder number 4 after it was done a cylinder head replacing
u pour the ounce of cleaner into the spark plug hole of teh low compression cylinder? correct and then to get it out what do u do??
In the video...what does he mean by blow it out before putting back on the spark pluggs??
I know video is old. Just got my first bmw. Inheritance - p0303. Plug , coil , injector all new. Want to try this but what happens if you dont blos out the cylinder? I dont understand how shooting air down the tube is really gonna get sny out
Would BG 44k work as an alternative? The Acdelco one is discontinued now.
Can this issue cause the car to go into limp mode if it is bad enough?
I have a p0303 I've switched spark plugs.coils no change didn't do compression test yet but how would I pur the cleaner in side the hole you side 1 ounce
I think I might have the same problem on my 2011 Dodge Grand Caravan. It's misfiring on cylinder number 4 and is losing 40% of it's compression. at idle, it's really noticeable, but when driving, it's not noticeable. What's more frustrating about it, is at night the misfire will cause my headlights to flicker when at a stop. I wonder if the piston rings are just getting stuck as what you mentioned in this video or if it's a bad valve or something? I really hope it's just the piston rings getting stuck.
What do you mean crank the motor ? Like literally turn in on ? Or just half way .
I have low compression in cylinder 2 in my mini cooper r56 but only when the engine is warm. can I try your solution?
hi sir im in canada 0 degres outiside is ok to do it outside or i need a garage to stay warm or it dosent matter
hi..thanx for the video..can u pls describe the procedure in detail.do i start the car with the spark plugs in or out?also do i crank with key?some say with a wrench or it can hydrolock.but i dont know how to crank manually.if u can mention step by step it ll be very helpful.thanx again
my 05 325i e46 94000 miles was purchased with the poo171 and poo174 codes replaced ccv and hoses upper n lower intake boots valve cover gaskets then it started missfiring on almost all cylinders well that i fixed by cleaning out the air distributor on top of the intake manifold with dawn made sure to screw back on tight n imidietly missfires where gone but still airleak codes im replacing all the vaccum hoses disa valve update throttle body gasket oil housing gasket and manifold gaskets this weekend any other suggestions??
Do I have to take all the spark plug out even if I only want to try this 1 cylinder only
Where could I pick up this product, and where pour it in? Because I'm having the same issue as well.
Low compression in cylinder 4 in my '06 330i N52 is burning my oil. It is black and half as much as it should be. Should I change my oil before doing this process or after, and whats the reasoning? Thanks
I used injector cleaner on my 530i on cylinder number 5, waited overnight started the car smoked up from the exhaust but not to much , it also smoked a little out of either the exhaust manifold!! Do i have manifold leak?? Is that why the o2 sensors are creating a missfire and lean ?
Great video! I have an 04 330i with a misfire on #4 only. Compression test showed 185, 187, 190, 65(#4), 188, 190. New plugs, coils are fine. Also replaced the #4 injector, and it was DIRTY in the cylinder. I dont get any coolant in the oil or vice versa, and I dont notice exhaust in the coolant either. No white smoke. Just p0304 and lean code. Could this be my problem? Also, what is the best soak to use now? The AC Delco stuff you used isnt available anymore.
What do you mean by "after that blow it out" at 2:55? How do you "blow it out"? Do you mean suction or air pressure???
I have an e38 2001 and after getting my oil change. The car started to run horrible! The engine was shaking bad on idle and there is white smoke coming from my exhaust. Changed my coils and spark plugs and the engine light is still on. The codes were p0159 and p1353 when i got it checked. Please help if you can
Hi I have x5 3.0i that will not run if the exhurst vanos is plugged in it shuts down number 6 .its had new vanos seal's in the pistons still no good if I unplug the vanos it will go back up to 6.help please
Hi, i'd love to hear your opinion on my problem with my m54b30 e46 330ci. I get a misfire code on cylinder 4 (and only 4), if I drive the car in 3, 4, or 5th gear, between 5-6000rpm. I live in Germany, so I get that code when driving fast on the autobahn. I have zero problems when doing a cold start. It runs and idles really smooth warm and cold. Coil and spark plug was changed from cyl.3 and the problem stays at cyl. 4. I drive it over 5000rpm and it shuts off cyl 4, and I get the check engine light. The car is only running on 5 cylinders then. 1 minute later the light disappears and the car runs perfectly smooth on all 6 cylinders again. It's a weird problem. My friend said, if the car would have low compression on cyl. 4 it would give me problems all the time, not only at 5000rpm and up. The car is a '02 with 160k mls. I would really appreciate your opinion. Thanks a lot in advance!
hi when you crank it 4 seperate time for 10 seconds each time, do you have to disconnect the plugs from the injectors and DME fuse and fuel pump fuse?
So when it takes more than one try does the compression slowly come up each try or does it keep reading 0 until it unsticks? Also how many trys should I give it before I can assume it is something worse?
Where to put the injector cleaner to to hole where the spark plugs is ???
Oops I meant the AC Delco x66p. Anyway, excellent video and even better product. Thanks again!
so checc this out. I'm having the same issue. I've tried the seafoam it worked but then the car cuts bacc off as if it lost compression again... I'm confused at this point. I'ma try what you have . I've changed camshaft sensors, crank shaft, fuel pump, spark plugs etc I had a reading that said that I had multiple misfires ... After I tried this fix . Should I try it again?
do u pour in the cleaner with engine warm or cold? and try it with every piston......im having cold start misfires
Do you have idea if this will work if i had 1 cyl(cyl number 4) with compression 0 :?
Hello, i live in the Netherlands and i cant buy the acdelco x66p over here. Is there a good alternative?
I got a question. My 2005 325xi had a blown head gasket. I was checking to see if the block was flat and noticed that the piston sleeves we're higher than the block ONLY IN THE MIDDLE BETWEEN EACH CYLINDER. Uniform in each case. Flush on top and bottom of the block. Is this by design or do I have a problem.??? Thanks so much.
Do I have to clear the code myself or will it go away on it’s own??
Do I have to change the oil after this procedure?
The M54 is a masterpiece but these engines have now fallen into the hands of owners who don't want to spend too much money on keeping them up to spec. But get a good one and keep it maintained and get a feel for its foibles - MAF air leaks, waterpumps, thermostats, coilpacks, ccv, leaking valve covers, and you'll have something that will still be going when they put you in the ground.
My e46 won’t stay on engine light is on OBDII codes P0300, 0301,0302,0303,0304,0305,
0306 tried changing coils still turns over rough for a few seconds then dies..
love this car but I don’t know what else to do.
can you help?
My car only has 40k miles with low compression in one cyclinder. Leakdown test suspects ring or valves. Will this solve? Dont want to spend 3k to tear engine apart
Can u put it in gas tank also?will it work by doing that?
Actually no I saw this video and was going to replace coils and spark plugs...I was thinking of adding this to my procedure
I have to unplug the injectors before to make 4 times for 10 seconds?
Does anyone can tell from where can we get this w/o ordering online ?
I have an 2007 530XI with 174k miles and has been misfiring on several cylinders and resolved a few coils already. However, my #6 still keeps misfiring and took it to a shop and was diagnosed with low compression. Mechanic said could be the cylinder and suggested I rebuild the engine or swap my engine. I was shocked to say the least. Would cost about 3k. This video just gave me new hope. Will try and see what happens. Keeping fingers crossed and will keep you posted.
how'd it go if you rmr
did it come back or what man
What’s the outcome @cryptodineros702 ?
great tip. mine is about 70k mile but it won't hurt by performing it now I think. thanks.
I have an M62 Non-Vanos, Misfires only on bank 1. All four cylinders on Bank 1 (#1-4cyls) Compression avg 160psi. Bank 2 (#5-8cyls) Avg Compression 183psi. (The spec is 173-204psi) Could this "fix" clear up the low compression for an entire bank?Or better yet have you experienced lower compression on one bank only?
this helps a lot ! I have the same problem on my 320 ci 2002. misfire on cyl 3 and 5 just until the car worms up a bit, and after that is runing fine, checked coils, replaced spark plugs, nothing seems to fix the problem. i've seen some oil marks on 3 and 5 cylinder head through the spark plugs holes and on the spark plugs when I replaced them. Is this also a simptom related to those rings sticking to the head and allow the oil to pass into the combustion chamber ? thanks in advance !
so do you solve the problem on oil in spark plugs brother?
I wonder if this would work on an N54 engine as well
Put Marvel Mystery oil every oil change. That will clean the cylinders well too. Dont wait for all that crud to build up and stick the valves and rings.
i have the same car same year same problem, does it really work?
thanks soo much
coils were check with a voltage meter I believe that's what you call it they all stood up around 26 25 Honda Reading moving back and forth thanks again
What if the ring is broken not stuck to the cylinders
My 2002 330ci has recently bin make a tapping like knocking noise when driven cold around 25-40mph but once it gets all warmed up the noise goes away. What can be causing this problem?
Hi thanks for the video need some help please 2000 BMW 5-Series 528i Sport
2000 BMW 528i Sport trying to buy for my son but Car has an intermittent misfire. I have change all the injector O-rings and filters, change out a couple of the coils, but can't get it to go away. Car will run great for a few days and then throw the misfire. it could be a vacuum leak
My ccv allowed oil into my manifold I imagine this is the issue I idle fine once started I can drive car in drive normal as it never exceeds 4k rpm while shifting soon as I get on it past 4k multiple misfire and they are all random I cleaned all oil and disavalves in manifold on my 328i and still no luck
My father picked up an 05 x5 with the same/similar inline 6 cylinder for next to nothing. It has a similar problem where cylinder 4 is dead, and cylinder 3 is intermittent. (the other cylinders in addition to 3 (somethines) ran roughly 150psi) We swapped coils, spark plugs and that changed nothing. we then soaked all the cylinders in marvel mystery oil, then dumped some snake oil (fuel system cleaner) in to the gas tank then added BG engine performance restoration into the crankcase and ran it for 15 min. We recently purchased the car and started looking it over to see what options and what-not it had (while it was running) and we got to checking out the trunk area and all the sudden the exhaust note cleared up and it started to run perfect on all 6 for about five seconds then went back to misfiring. Going to dump some of that stuff into the yap for a day or 3, get it up to operating temp a couple times and change the oil and hope for the best. I did notice a tapping noise under the valve cover, so we'll probably pull that and have a look as well. thanks for the video!
EDIT: Looks like they discontinued the ACdelco stuff and what is available is $150+. Will look for something comparable that is cheaper. if it works, i'll edit this again in a week or 2
I have an issue with my BMW 535i xDrive 2009 change the spark plugs had a problem with the valve cover change the valve cover gasket so now it runs really good while you're going smooth but when you come to a stop it has a little rough idle and you help me in that area not too sure what's causing that just trying to do my homework might have to clean the front sensors or wondering if it could be a injector code number came up po302 PD on one of them the other one with just po302 thanks for your help
Paul Perez damn I have the same exact car 09 535i xdrive and same misfire on cylinder 2 p0302
I have no compressed air, so is it essential to "blow out" the cylinder before replacing the plugs? Thanks, and great video
The description will tell you what to do
I had these symptoms on my M54. I turned out to be a broken exhaust valve spring. The leak down test will hold the valve closed and test good. However the broken spring won't work well enough to make good compression.
I have nearly no compression in one of the cylinders. However, I did a wet compression test and the cylinder gained compression. Pretty good compression, actually. Is that a separate issue, or could that also be caused by carbon buildup? Thanks in advance to whoever answers my question.
It sounds like you have a compression ring issue which is what this repair is designed to help. I would say you have a good chance of resolving your low compression problem with this procedure. Good luck!
Would this work on my 2004 BMW 530i
Thanks so much, I believe this is exactly what is happening to my 2003 X5! I'm going today to purchase some top end cleaner and try this! Pray that it works cause I've pretty much checked everything else! I'll let you know how it goes!
so how did it go?
Can any fuel injector work or does it have to be that particular brand?
+Albert Ciego You can use other cleaners, but this seems to be the strongest one from our experience. Hope that helps.
okay I have a question everything seems to look good on my 535i xDrive BMW 2009 but did have a misfire on number two change the spark plugs the cause was also due to a bad valve cover gasket leaking into the plugs so change the plugs clean replace the valve cover gasket the light went off runs good but when stopped and idle runs a little rough can you tell me what that might be thank you so much really appreciate it waiting for your reply
Paul Perez I have the same problem
Do you think this would work in a 2002 BMW 325ci, it has low compression in cylinder 4 and 6, appreciate your help thank you!
I would like to hope so. This video was made for the motor thats currently in your car. Be patient though since sometimes you might have to do it multiple times depending on how much buildup is on the piston ring area's. Let me know if you have success !!
I'm having an unusual misfire on a N52 engine. No error code or check engine and I had 4 mechanics take a look ..... no one can figure it out. ignition coils are good, spark plugs are good, No vacuum leaks, No temperature or overheating issues, I monitor the oil levels and its good. All the main gaskets were replaced, fresh oil change and new spark plugs but still a random misfire here and there. any advice please ?
Wouldn't that throw a code ?
I used to think lifters were the culprit, but I guess acdelco cleanup is the solution. My friend that has been helping me with maintaining my E46. He thought it was bad lifters were the cause of the misfire on cylinder 3 because he has seen some that were worse with lifter issues. He drives a E46 330i and has seen that on many E36/E46 he has owned for the past 10 years.
Hey yeah that theory is totally true.I injected 2 bottles os sea foam in the intake and idled for 30 minutes then went and drove it hard to flush out...the skip was still there..I turned the car off and right back on...wolla the skip is gone...
Will the AC Delco Upper Engine and Fuel Injector Cleaner - 18 oz. Aerosol Spray, work as well? Also should an oil change be done after doing this? Thanks! awesome videos!
+Dj Aikon why would you do an oil change? no - oil and fuel cleaners are not supposed to mix
Yes man fr but do it professionally that I'll let the pros at BMW Seattle do just that 1 time after situation like this tbh
Could not get the pic to post but on a compression to bar chart, cylinders 1-5 reads 9-9 1/2 bar while # 6 cylinder reads 6 1/2 bar.
Troy I would try it and check your results. It couldn't hurt. Usually with a wet test it should go up if it is rings, your right. At this point you have little to lose VS tearing the engine apart.
Is there any other store brand or fluid (seafoam...etc) i can use to do this with? I need to fix my cold start missfire asap to pass emmisions test and i only have 2 days left to do this....
I'm sure you could try seafoam, but our experience shows that the BMW/ ACdelco top engine cleaner works better. Its a little more pricey but for good reason. Hope that helps
hey there great video !! have you ever seen or dealt with a misfire that turns out being a hole in one of the cylinders ? I have the same bmw 325i and just had it looked at what was thought to be maybe low compression with the coils and or plugs turned out being a hole found in my #3 cylinder resulting in me having to buy a newer motor (which I haven't bought yet) but yet just a couple days I replace the battery and even though it was driving rough I drove it around for a few miles. Seems a little odd to me however these guys were certified specialist with bmw / Mercedes. the car rough idles at 500 rpm. I can start the car but the moment I put it in gear and press on gas the low compression falls and stalls the car out making not able to move. Does this seem possible that I will need to replace motor. First time I have ever owned or had to deal with problem on these cars. Let me know your idea thanks
Mike
its a 2003 at 180,000 miles
Good video and tip. I’ve got an 02 325i. P1349 cylinder 4 with fuel cut off, P1351 cylinder 5 with fuel cut off and P1353 cylinder 6 with fuel cut off. I’ve tried swapping coils, plugs and this cleaning (used Lucas since no one carries this in retail seems like I have to order online). No help. Car runs fine for a bit then when in idle goes into sputtering, CEL comes on and get the same codes. Anyone think I’ll get better results using this AC Delco brand cleaner or any other suggestions?? Thanks all
its your Maf sensor or a intake boot leak, do a smoke down test at a trusted shop sould cost 40 bucks to smoke test a car for leaks.
when you crank the car without the spark plugs and coils, do you remove the dme fuse or anything to stop the fuel injectors from squirters fuel into the combustion chamber, or the fuel will not pump because the coils are not connected, is there a step missing from your instructions or just crank it like that
Lmfao no car on the planet is going to start while sitting still with no plugs 🤔🤔??? 😂😂😂 I mean duh