How to fix a rough idle/clean, replace IAC valve and the P0300 code
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- čas přidán 27. 06. 2024
- Whats up people! This video is a How to possibly fix your rough idle problems,. My daughters car had a rough idle and a P0300 code. p0300 code is a random misfire code but it doesn't tell you exactly why. So to fix this you have to step by step go through and check all things that could be causing this misfire. The car i'm working on is a 2006 Chevy Aveo and i started by checking the plugs, wires and coil, these were not expensive so i just replaced them. when i replaced them this helped the problem but didn't fix it totally. after that i checked for vacuum leaks and cleaned the egr valve and iac valve, after cleaning the IAC valve i tested it to see if it worked and the valve came apart so i had to replace it with a new one. after installing the new one the rough idle is all cleared up and the car is running well. In conclusion i do not feel that the Iac was the main reason for the misfire but it did add to the problem. By doing all the things above which consist of a tune up and replacing a few things my rough idle is gone.
I hope this helped anyone out with a rough idle that might not no why you have it or have a p0300 code.
Thanks for watching and don't forget to like and subscribe !!! - Auta a dopravní prostředky
Your Daughter is lucky to have a dad like you.
I do my best !
i replace fuel pump, spark plugs, wires, fuel filter, i clean fuel inyectors, and NOTHING!!
and finally i saw this video and guess what???
THAT WAS THE PROBLEM!!!
thank you so much for posting brother!
i spend almost a week trying to figure it out!!
Glad it helped man !!! Thanks for the comment!!!!
Yeah u can just uninstalled the iac and once the vehicle it's the iac, I usually get stuck on choke...and vehicle won't start.i almost bought distributor too, spark plugs etc but it's was the idle air.
Good to see a dad who loves her daughter, like you do. And, good job, fixing the rough idle. I will replace mine today.
Hope it fixes your issue
Thanks for being one of the few people who run video / audio of the problem, _before_ you fix it. It's helpful to compare to.
That was super super. Just today I had that same problem on a friends car. The exact same issues on an older Mercury cougar. I had other codes but the exact symptoms. Thank you for all your help! I bet your daughter was super happy as well. Thank You!
Glad it helped !
Thank you Chuck. You saved me a lot of money and hassles. This video was down to earth with dry Dad humor. You do an awesome job!
Thanks for the comment and I'm glad it was helpful
chuck kososky the going price to have that job done at a garage would be at least two hundred dollars including parts and labor. The IAC valve can cost over $70.00 from Delhi and $90.00 from Napa. I ordered one from EBay for $7.50, with a one year warranty, and installed it in about 20 minutes following your directions. I bet your daughter is proud of you for the fine job you did. Anyhow, thanks again for helping me too. Videos like yours make CZcams great!
@@Mksteele747 thanks
This video really helped me with my 98 Chevy Malibu. It was missing really bad, cleaned the IAC, now it's running great. Thank you!
Glad it helped thanks for the comment
I will work on my nissan on that problem
@@AllThingsCool I have a 2004 ranger the does the same thing.
Chris Rupe that’s how it’s mine so that might be then
Hey Chuck, you were right. I changed plugs and wires and suv is running like a top. Thanks for the video and advice.
Thanks bro. I liked you're style. I'm working on a srx with two hundred thousand miles. Everything helps. Knowledge is what i need.
@@laurasyn820 sorry I can't remember
Thank you chuck, I learn something new and its very important cause here on the island where I live. A lot of cars had this problem. My car have this same problem you mention and I know this will fix it.
Glad it helped u
Man this video really help me, i have a 2006 VW Jetta. Replaced O2 sensors, coils, plugs, wires, until i ran across you. Thanks that what the problem PO300 code. Running great! Scotty from Delaware.
Glad it helped buddy !
Good job bro!!! You did hit the nail on the head right up!!!!
Thank you. Brilliant vid. Really helpful. Just to add if it helps anyone. I had this trouble on a k12 micra. Before I cleaned idle valve I changed the coolant temp sensor and that alown made a big difference.
Great video!! I got a 2002 Toyota Camry Le and this same code Po300 thru Po310 has been driving me CRAZY!!? I replaced valve cover gasket and spark plugs an seals!! I'm no mechanic but I do have knowledge on my own car except for ?? Yelp,, Po300 code is poopy !! Lol I'm gonna check IAC today!!! Yhanks for video...brb..
Did it work
i got same code for my 2003 infiniti g35, and ive been going crazy on tryna solve the problem. ive replaced valve covers, valve cover gaskets, cleaned upper & lower manifold, replaced plenum gaskets, new spark plugs, coil packs, and im just running out of possible sources for the cause of P0300 random misfire, with a blinking check engine light. Watching your video has given me hope in solving this cars dang problem, ^.,.^ So hopefully my g35 will be up n running like the car it was made to be....... hee hee.... will update u soon.
My gal has a 2007 chevy uplander minivan it's doing the same thing your daughter's car did.
This is a great video, because it gives me some realistic possibilities.
Did the plugs (CHECK THE GAPS - don't assumed they're right in the box!)/wires/tb/distributor cap/rotor all the obvious and IAC was dirty. PLUS (free tip) had a small hole in my exhaust right before the 1st O2 sensor off the manifold. Welded that closed and WOW. What was so confusing - NO codes whatsoever. Haven't had this 03 S10 running this good since the day I bought it! 305k miles and STILL runs like a top. You take care of it, it'll take care of YOU! Thanks!
You are a good Dad.
Perfect you are my hero, thank you
Nice presentation!
Thank you for the video man I appreciate it great video
Ha, went in the exact order you did working on a friend's car with the infamous p0300. And iac is what it was. Thanks bro, saved a bunch of hassle.
glad to help
Was the only code P0300?
That is my only code, with check engine light and too much misfiring. Pls advise.
@@nazareta6541 with that code, it can be a number of different things. But normally it's the iac either needs cleaned or replaced. Bunch of videos about it.
@@GOIN-CRAZY thanks, I'll take a look at it
@@nazareta6541 sure, I used carb cleaner on a few of them for carbon that gets gummed up. Worth a try before buying one. And most are easy to get to.
I had the same problem and got the fuel injectors clean and problem solved.
Sharing this video is so helpful, thank you
Thanks for the comment !
HI Sir. G35 coupe is still doing the same after 6 new ngk irdium plugs, 6 new hitachi coils, mechanic said he cleaned TB & maf. I order a new intake tube silicone couplers because there was a slight rip in one rubber coupler. I'm going to buy this just in case the po300 code is still there before buying 6 fuel injector. Thank you for posting this. Peace & Blessings
Nice explanation man!👍👍👍
this was awesome!! it really did help me thanks!!
Sounds like a little girl owes daddy a big hug :)
Anthony E. Lol she wanted to pay me but i told her that this ones on me lol
You are the best dad and I bet your daughter is proud of her dad👍
thanks chuck. i learned something new today very helpful..////
Glad i could help
Congrats Bud !
Thanks !
Great video....I have a mustang 2007 and I have the same problem.. this video help a lot
Glad I could help !
Ok yes crossed my fingers just before you said it
Fantastic video
Honesty is great. About the part coming apart
Makes me realize i just might be able to do a few things on my car
Without paying an arm and a leg lol
Dammmmm dealerships why can't they figure it out
Trust creates loyalty from customers
Gosh I've learned so much in so many videos lately
Thanks again for your video
Hope you're still seeing comments it's been a bit since post
Ps example. Was told i needed a cabin filter ......my car does not have this item lol Yessssss it's old
yes dealerships are pretty expensive.... research research research and dig in !!
Just wanted to tell you that the old valve was working properly, just needed cleaning, but there's a way to do it. It's supposed to spring out if it's not inside the throttle body. There's a tiny magnetic motor that spins a spring-loaded screw.
Here's the trick on how to clean it completely.
Simply put the valve inside a rag and turn the ignition key but don't start the engine. Then you'll find the valve's tip is out and inside the rag and then you can thoroughly clean it. After cleaning it, put it back together and DISCONNECT THE BATTERY, fit the connector while the ignition is turned on, then HOLDING the valve forcing the tip inside with one hand, and connect and re-disconnect the battery about 3 times with the other hand . You'll notice that it's retracting to its normal position. Careful not to forget holding the valve tip while connecting the battery or it will shoot out :)
It's a hassle, but that's how you clean it and avoid buying a new one.
Am good to check my jeep liberty sport 3.7L 2002 having same problem hopefully it works thanks for sharing this good video.👍
Did it wo
Good job Dad. Luckily it wasn't necessary to get the whole throttle body replaced.
you're my savior!!!
Glad I could help !
Tnx.. very impormative
2007 chevy colbalt same problem code po300 changed spark coil packs stiil no luck but now I am going to do exactly what you did in this video hope it solved the problem. Thanks for the video
Also check you plugs and wires that could cause problems to. Hope you get it fixed !
Thank you. Finally someone who kept it simple and explained it to me. Hopefully this will fix my car.
Good luck
You doing very good job 👍👍👍
Nice video 👌👌👌👌👌
You teaching very good you very good teacher 👌👌👌👌
thankyou
I have same issue
1st shop i went, change the coil n plug wire.. A local set..
Problem went off.. But start again few months again
2nd time happen, i wnet to Chevrolet Agent to diagnose..
Same shyt they change, but Original product..
N months later, came again..
I have cleaned to parts n will start to monitor again..
Hopefully it settled..
Cheers mate👍
Great job bud.
Thanks !
Yep can hear it! Nice video thanks for sharing!
glad it helped !
New subscriber here, great video.
Thankyou !
I am in this same boat. Going to try this 1st thing in the morning. Thank you.
hope it works out for you
@@AllThingsCool Hi. It didn't work for me, dang it. On the 2008 its part of the throttle body. I'm still fighting this little pecker. It seems that I am not getting NEG pulse signals from the ECU. I thought it was bad (the ECU) but after changing it, things still wont work. I would enjoy blowing this damn car💣 up at this point. I'm glad yours was fixed though. Have a good one. Kenny🙂
@@goshring sorry buddy sometimes it can be real frustrating to find the issue wish you luck
@@goshring by any chance did you find the issue?. I have a 2008 Aveo too…
Lmao good video now you will know how strong they move in the IAC
Sometimes you can tap the iac valve while your car is idleing rough, and if your car changes idle speed immediately, then your iac valve is definately bad. But if idle speed change is not detected after the tap, then chances are it most likely will be a stuck open/shut throttle plate. Taking the throttle body off and cleaning it with carb cleaner wire brushes and wrags, will have it running like new
Do you think slamming the hood closed and having your car idle stall a little bit could be due to a bad iac valve?
mine is a tad smaller and non adjustable. i just clean it and a couple drops of oil +replace.
Yea ive been chasing this issue for a while. New plugs /wire And ignition coil. Now going for aic valve
Did it work?
@@roccovelasco7159 Noo. 2006 has no aic valve since its electronic instead of cable driven. The car is gone now. Water pump went and overheated the motor.
Great job..i have a 1500 5.3 doing same thing same code..great help
hope it works for ya
Where is yours located can't find mine lol
Wow. Described my suv to a tee. I watched your most informative video only to find out my engine doesn’t have an IAC valve. :-( Not sure where to look now. New fuel filter, new fuel pump, new pcv valve and new air filter. No luck yet. 2004 Santa Fe. Thanks.
Try plugs and wires
chuck kososky how hard is it to take off the manifold? Does it have a gasket? Thanks for your reply
Egr valve maybe clogged. Or intake full of carbon. Whoever decided that engines need to eat there own shit and make it a requirement should be made to eat there own shit mixed in with there meals. They'll be saving the environment. And get all the nutrients still there going to waste like dogs do. Delete or block them off. If check engine light bothers you. A racing or tuning shop can turn the light off for good with most cars. With my mustang I bought a Diablo programmer and was about to turn it off and cat converter code. Your car will run much better any engine with one or both of these done.shits Killing cars daily that and water thin 5/30 oil. USA is the only country doing this super thin oila. 5/30 is mostly all additives full of plastic polymers that sludge up. 10/30 has twice the actually lubricating oil. 5/30 isn't made for above 40 degree weather. They say it's good for 95. Drive your car on a90 degree day and change your oil that 5/30 is thinner then water. Cars without oil gauges which is most cars you don't see the oil pressure drop on those hot days and city driving with it. The most damage occours in bumper to bumper or rush hour traffic as you idle along the oil pressure is the lowest because rpma are low. That's why idling is rough on a car. Engine is hot, radiator is hot getting not much air unless it's a motor mounted fan not electric. I've seen many trucks switch to the electric fans only to go back to clutch motor driven fan. Oil is hottest then as well the oil pan is getting no airflow. The motor is heat saturated. Best you can do is crack the hood and let more hear escape headers are 1100 degrees. Oil breaks down as well by the time it comes to change that 5/30 is a 5/20. If you find your manual for a different country it'll show thicker oil. My car calls for 5/30 now a couple years later same motor no internal differences calls for 5/20 in another country calls for 10/40 15/40 and 20/50 depending on temp. Unless below 0 degrees don't use a 5/10-30 weight oil. But here in USA now want to put 5-20 in everything. If your gonna have 30 weight use 10/30 diesal oil. It's dual rated for fleet yse you'll see the API sn logo on it. It's way more stout oil. Much better additive packs. Diesal conventional oil have been going 10k+ mile changes of today's synthetics for decades
Nice job!
Appreciate the feedback
Hi Chuck, awesome video... I had the same problem which helped solved the surging at idle...
The next question in my research is to find the problem with my daughter's car (yes another daughter needs dad's help they forget that we were surplus to them between 13-20y..)
Anyway .. back to the question, most forums and posts on the same topic pointed to Vaccum hoses or the TPS - however in after replacing the TPS or cleaning it after the battery has been unplugged for a couple of weeks - means you will need to teach or relearn the TPS for the ecu.
The actual sequence to do this for the model of the engine in your video (1.6L ecotec) 1.6-litre twin-cam 16-valve F16D3 Daewoo inline-four engine (Holden Barina) Chevy? GM?
I cannot find ... I found others very similar.. maybe even the correct one.... just wondered if you actually know how to relearn the TPS (throttle Position Sensor) on this engine family
I don’t know how to reset one I been looking, some people do and some don’t that a nice video!
Two thumbs up. Very good video.Dont have the problem but if l ever do....thanks
Very Gud... it really helped... God bless u!... But there's no black smoke from my Kalos 1.4 engine... But rough Rpm & fuel is now high
Glad it helped
Never start a vehicle with the IAC unmounted from the TB. The stopper/valve you cleaned operates like a piston. The interior wall of the TB is what stops it's forward movement during operation. You can crank the engine with the IAC's wiring harness unplugged to listen for changes in idle speed, but not when it's physically unmounted from the TB housing.
Good job. I'm in the process of changing sensor and coil plugs etc..I think it's the IAC but cleaned the throttle with way too much cleaner smh foiled plugs etc..
it can happen good luck !
great job
I have a Thunderbird Supercoupe acting like this thanks for the info I'll give it a shot it was my thoughts this was it the problem so lets see thanks again keep making the vids
Hope it works !
Idle IAC, nice man !
Yup just do it one time with a new part an u will feel better. Good job.
Thanks !
Thanks real good info, I'll do mine :)
Thank you sir 👍✌👌
My little sister is having the same issues, giving her the P0300, P0302, P0303 codes... pretty much misfire in Cylinder 2 and 3. Gonna try and diagnose it this weekend. Side note shes had the P0420 code for a while. any tips before I get started on it?
Symptoms sound exactly like mine on 1999 Nissan Avenir.... Will have a look at the ICV. Thanks, great vid👍
Hope it works if not check your plugs and wires to
Thanks for the video! Very informative. I love your Cornhole board! 🇺🇲🇺🇸
Lol thanks for the comment
Nice job
Thanks
I liked the way you explained things, good job, I wish you were my mechanic, having some problems with my 1996 Pontiac Grand Am SE 2.4 L 175 thousand miles, it hesitate badly since Yesterday, any ideas?
Thanks 👍
When we clean the sensor from the inside, the size of the screw changes during assembly, so how much is the caliber of measuring the length of the screw from the outside, i.e. from the mounting point from the induction gate to the foot of the accelerator pedal before installing the sensor electrode and before operating ??? Thank you
tanks .........................brother
It's hard to believe but your IAC valve is identical to the one that Dodge 3.9L uses, or at least it looks the same from here. Just cleaned mine, the pintle was so carboned up you couldn't tell what shape it was supposed to be, and it helped a lot but my problem is still intermittent so I'm going to change the TPS next. I could see when you were cleaning the pintle on yours that it was loose and I thought did he unscrew it? Because you can can unscrew it and clean all the way down inside. So when you said that you turned on the ignition b4 reinstalling IAC and the pintle popped out, because it's spring loaded, I thought yep that screw was broken. The threads on the pintle are over an inch long and it's amazing that it broke. Nonetheless your tutorial is very helpful and informative. Thanks for it.
Thanks! I think I have the same problem in a 2005 Aveo. Was getting a P0106 error (map sensor) and replaced some old cracked hoses. Seemed to clear up the code but it came on a few weeks later and I’ve had a persistent rough idle as well. I’ll report back.
Check your plugs and plug wires to
glad u got it
Me to lol
Nice tips, I also facing same idling issue on my toyota caldina. I already clean the throttle body and it turn out a nice result but still a little exhaust shaking. I doubt the Iac valve is needed to replace.
Maybe check plug wires if there bad they can also cause hesitation
Shot out of there like a canon... LoL !. Dude , never clean a TB with it on the engine . I just puts that crap into your engine. Good video Bro
Thanks
It just shot out, haha, that's classic stuff right there.
Hopefully this will fix my 04 corolla
Is your Aveo's PCV valve broken? If it isnt working, oil and soot will continue to foul your throttle body. Also is the low idle unit dirty from deposits? The throttle body needs to be dismantled and cleaned.
Yep got that right
How should I clean my throttle control ? I dont have a computer do I unplug the negative cable on battery for 15 mins or just clean like you did with it on? Thanks
I have a 1988 Range Rover classic have slight surges 1100 to 1500 I checked the tps and adjusted its millivolts to 325 specified on workbook. Ruled tps out for sure.Still surges and does a gurgle sound on muffler and air intake tube. She has a Buick 3.5 l v8 efi. EFI lights on and she definitely smells lean. Can this cause lean condition and rpm surges. I guess it does. This rrc has no obd2 port. She works on maf tps iac etc’s and o2s
My 2003 Ecotec Cavalier is doing this now after a P0301 misfire. Fixed misfire with new coil pack but now has that same rough idle. Has new coil pack, ecm, plugs, injectors, and fuel filter. I was guessing MAP sensor but im going to try cleaning the IAC and throttle body. Will update when I know.
did it work?
Awesome vid Bro. Ill try this on my car. Couldnt help noticing the muscle car at the end of your vid in your garage with the bonnet up . what are you building. Looks cool. do a vid on that.
Thanks hope it helps you out. And the car in the back is a 1965 impala check out the build here
czcams.com/play/PLwWeQk4BfBOH5WRwIC1DSLm6Z7t4PlA-e.html
@@AllThingsCool Sweet as. thanks chuck I will do that.
Thank you .my 1998 ford ranger code po200.po300.po400.changed spark plug. # 2 misfire.will change wires .and regulator.strong smell gas..maybe change exhaust converter.im reading .watched ur video thanks blessings.
Oooh snap ! I just gone did an engine swap lol chingauw!
The battery was disconnected so it has to relearn the throttle body butterfly location sequence! To fix it read my previous comment!
Legend has it that the rest of the old IAC still haunts the garage to this day.
Lmao
Good video.
@@lordvader7871 thanks !
@@AllThingsCool word. I need a video camera to make good videos and gelp people save money. You'll see me around. Stay safe
I'm gonna try this on my son's 09 Chevy HHR! Already spent a couple hundies on it!! 😡
good luck !
Well first I ordered a ECM already programmed and security bypass from Ares technology or something?. We'll see how that goes?
I'll try this tonight. If it works, I'll let you know and buy you a beer!
well how did it go ? i like corona lol
LOL - I did not try it finally since I checked it again and my RPM's are still low (800) so it's not the same symptom I guess. I do hear a hazing noise but cannot detect the leak spraying it... I guess I'm taking a brake to think, ha!
Thanks for the Follow up Chuck!
Franco.
@@sec207 vacuum leak ?
Thanks I'm gonna try that on 2006 2,2 Chevy Malibu. Hopefully it takes the misfire away.
Thats what im working on, the plunger seems frozen, i did what you did, but i lost the oring,found it,put it in its place so i woulnt loose it, with the valve out i fired it up,an the o ring got sucked in, i dont think its going to hurt anything,it idled high seemed rough though. I will start fresh with a new one, an noticed i have gas seeping out where an injector top meets the fuel rail,meaning i have to pull the manifold off. 93 trooper,3.2,gas, any tips?
I have a 2013 JGC 3.0L diesel. It had a fuel dilution initially I suspect that led to leaking turbo seals. Intake had a lot of oil in it. I changed three out of six injectors and the car has very rough idling puffing out white smoke with very poor performance. Can't get it to climb above 45m/h on a flat stretch. It drops to less than 20m/h on inclines. Could it be the IAC?
Nice
Thanks ❤️💪🏿👍🏿
I have the same issue, 2004 f15 4.6L replaced spark plugs, nothing! replace coil packs! Nothing! Cleaned the throttle body and it ran Breyer but still not right! code was the same, replaced the throttle body,, nothing!!! I just replaced the temp sensor as looking at videos on U tube that can also cause it!! Nothing!!!!!!!!!!! I will try this next, I am still getting a misfire on # 4 cyl, first it was #5 then it's randomly,,,, my truck has 100, 000 miles so it's not a lot,,, never had issues till suddenly this happened,,,, I'll try this and see what happens,,, I have a scanner ,,, thanks for the video👍🏼👍🏼👍🏼
Hope it works for you !
People.. Even mechanics would have a easier life and less hours on the job at the expense of the owner. If they would CZcams a symptom and get the damm thing done. Thanks man.
for sure !
Does it hurt using carb and choke cleaner in a fuel injection fuel system
Going to do this now. I've already replaced the battery, wires, plugs and the alternator and it idles between 600 and 725.
Good luck!
Runs better when I disconnect the 02 sensor than goes back down when I reconnect it. Wondering if the sensor that plugs in is going bad.
Clean the throttle body throat. Be careful and do not open the throttle flap by hand. Have someone hold the gas pedal down to the floor while it’s being cleaned.
Heh man i have a P0300 DTC comes up when i checking the engine, but i never have a check engine lights on, accept before that and it is a MAF sensor that i have change the sensor. Now the P0300 comes when i plug the scanner, but there is no check engine lights. Should i change the sensor or just wait until check engine lights on?
I'm having same issues, I cleaned the MAP sensor and throttle Body. Still the rough idling, knocking sound persist. I guess I should have also clean that IAC sensor too and should do the work.
good luck 👍
Does a grand cherokee laredo 1998 trotle body have a seal tha have to be replaced once it is removed for cleaning purposes?
Yes it has a gasket that should be replaced when you start your reassembly, and be sure to clean the mating surfices of the throttle body to upper intake plenum really good before you install your new gasket and use a little bit of gasket sealer on one side of the gasket as well, this will insure no intake leak at the connecting surfaces