4:53 First thing I do for a misfire is I do a "clear flood" You just push gas pedal to floor and crank the engine. It disables the injectors and you listen to engine crank for low compression.
@@MarkHorn-td9mh I dont actually use a compression tester. I use an Oscilloscope and amp clamp to do a relative compression to identify the cylinder. From there a leakdown test.
I brought a mark VIII back to life with mystery oil in the cylinders recently. It had sat for years. Very low compression on multiple cylinders. This ecotec needs the same treatment, followed by a steady Drip induction & new plugs.
I was always taught to do compression tests by disabling the vehicle from starting and pulling out all of the plugs and holding the throttle plate open as you crank the engine over to build compression.
Yes dsable starting always. However modern efi systems will not start if WOT when cranking, it's a fuel cut called clear flood mode. Just a short cut used for comp. testing cylinders.
@@MarkHorn-td9mh Yes, I'm familiar with clear flood mode. I also use it to listen to the cadence of the engine as it cranks to see if it sounds even or not before doing an actual compression test. An uneven cadence can indicate a compression problem.
Poor fella. Hey Matt got a question for you when you reinstall used spark plugs do you use a torque wrench or do you just go by feel? I ask because the crush washer is already crushed.
Its a junkyard motor. Some mystery oil & a smoke show will bring back compression. Those ecotecs are solid engines. Definately needs a steady Drip induction for 15 min & a few tanks of seafoam or b12
I know you're asking Matthew, but I run NGK plugs in everything I can from my lawnmower to my 89 cavalier Z24, my 03 avalanche etc and I never got a bad plug from NGK. I do own a hardware store and I have seen bad plugs from cheaper companies show up bad out of the box...cracked porcelain, chipped or bent electrode strap or tip.
@@eddiereichel9354yup, I'm just happy with NGK, but if I can't get em for say a gm which would be ac Delco, I'll happily run those. If one of my Hondas needs em, I'll go with ngk or Denso etc.
I won’t claim that NGK/Denso are the absolute best spark plugs, but for import cars I wouldn’t even consider using any other brands. Take from that what you will. Honda’s OEM plugs are manufactured by NGK (believe Toyota uses Denso) so that’s the best to replace it with for OEM or better performance.
You didn't disconnect the injectors or the fuel pump for that compression test. You can do a clear flood, too, but you didn't do that either... you definitely did the compression test wrong.
Once again the client FAILS to devulge to Parker that the engine is USED. Did you hear that the client didn't say anything when Parker pointed that out???? It kills me how people deliberately leave important information out when speaking with mechanics. That engine probably has mechanical failures and he tried throwing spark plugs, coils and a whole throttle body at it. Classic GM!!!
@@derekp6636 True, maybe he didn't know. It's possible. BUT this client does seem to be more educated than most on this channel so i felt based on his answer to Parker, that he knew.
I'm an older woman who is not a mechanic, and I know very little about cars, but I had a similar issue with a Dodge Dakota. It turned out it was the oxygen sensor. Just a thought.
Cyl 1 is leaking badly, 2 and 3 are ok and cyl 4 is also low on compression. Needs at the very least head needs to come off. Prob some burnt or bent valves. Doubt it’s the cyl themselves with it running like that. Can’t know until you scope it or remove the head and look.
@@Unknown77710 I hear ya but poor is poor. Every 100 dollars count. I grew up around that environment. Thankfully I found success and moved far away from it but the struggle is real.
You can remove the entire intake manifold. You have can a bare nut block on the shop floor with nothing more than a cylinder head on it. You can perfect compression all cross, or low unbalanced compression like this motor needing valve job. MAF, intake gasket will not affect engine compression. Faulty MAF will cause incorrect fuel trim( rich/lean/stall condition) Same as leaky intake and low intake vacuum. We are talking about the base condition of the engine, cylinder wear, pistons, piston rings, valve and cylinder head sealing. Unless you meant head gasket, but that wouldn't effect cylinder #1 and #4, it would have to be an adjacent cylinder to effect each other.
@@MarkHorn-td9mh I watched the video up to the point where he found multiple misfires and the dude said the plugs have been replaced. My post was referring to having a multiple misfire issue sorry.
Totally thought he hooked it up with a joint when he handed over the key. Hahaha
4:53 First thing I do for a misfire is I do a "clear flood" You just push gas pedal to floor and crank the engine. It disables the injectors and you listen to engine crank for low compression.
Awesome procedure.
Me too.
And new sharder valve on that compression tester.
@@MarkHorn-td9mh I dont actually use a compression tester. I use an Oscilloscope and amp clamp to do a relative compression to identify the cylinder. From there a leakdown test.
Does that actually work? never heard of that
That’s the bad part of my job telling my customer he has a bad engine. That sucks
I brought a mark VIII back to life with mystery oil in the cylinders recently. It had sat for years. Very low compression on multiple cylinders. This ecotec needs the same treatment, followed by a steady Drip induction & new plugs.
Always blame the wife
I didn't know Freddie Mercury had that many tattoos.
😂
Perzactly what I thought 🤔
I was always taught to do compression tests by disabling the vehicle from starting and pulling out all of the plugs and holding the throttle plate open as you crank the engine over to build compression.
Yes dsable starting always. However modern efi systems will not start if WOT when cranking, it's a fuel cut called clear flood mode. Just a short cut used for comp. testing cylinders.
@@MarkHorn-td9mh Yes, I'm familiar with clear flood mode. I also use it to listen to the cadence of the engine as it cranks to see if it sounds even or not before doing an actual compression test. An uneven cadence can indicate a compression problem.
I have always just unplugged all the coil packs and take out the fuel relay and test it like that
Yeah this guy has no idea what he’s doing
That apollo is a damn nice scanner. My boss recently spoiled me with it.
Check the gap on the plug if oil on plugs means plug seals
That sucks. I've seen bottle fixes work on older cars but I'd be wsry to try it on something modern
In a shitty world like we are in today. God bless this guy. There are still truly some hard working genuine people out there.
👍 Great job, good advice.Just don't let it go to your forehead.
Totally worth putting a new engine in it especially with your rust free region
Squirt some oil in the cylinder of the problem cylinder lol compression will go up for a little while
Poor fella. Hey Matt got a question for you when you reinstall used spark plugs do you use a torque wrench or do you just go by feel? I ask because the crush washer is already crushed.
Typically when washer is already crushed you just do a quarter turn. Just go from “12 oclock to 2 oclock” dont go anymore
Its more like an 1/8, same as tapered.
Cracked head for some reason the eco boost 4 banger always cracks on 1 and 4 right around the valve seat
That ducks...
As an owner of 2 used boats.. I would never buy anything with a used motor without doing a pressure test on all cylinders.
Best of luck.
Yep, she gone.
Can't wait til you get a 1.4L turbo to work on. Hard to believe you haven't had a call for one yet. Carbon build up causing misfire
He did have one i thought. Remember that nurse in the underground garage with the Buick Encore??? Don't those have the notorious 1.4 liter?
No this one is the infamous star branded 1.4L turbo made in Italy for the Jeep Renegade models with the front wheel drive 6spd manuals
@@markgilbert790 well the gm 1.4 turbo is also garbage
Sometimes i wish the situations he gets himself into werent so deplorable
lol just tell him. Low compression definitely bad piston!
Valve job for sure. Common on this motor
it doesn't always mean pistons rings it could be a blown head gasket or bad valves
Its a junkyard motor. Some mystery oil & a smoke show will bring back compression. Those ecotecs are solid engines. Definately needs a steady Drip induction for 15 min & a few tanks of seafoam or b12
hey Matthew, " what kind of spark plugs would you use in a toyota camry? NGK?"
NGK or Denso would be your best bet.
OEM The answer is always OEM for electrical or engine parts. Depends on the year who made them.
I know you're asking Matthew, but I run NGK plugs in everything I can from my lawnmower to my 89 cavalier Z24, my 03 avalanche etc and I never got a bad plug from NGK. I do own a hardware store and I have seen bad plugs from cheaper companies show up bad out of the box...cracked porcelain, chipped or bent electrode strap or tip.
@@eddiereichel9354yup, I'm just happy with NGK, but if I can't get em for say a gm which would be ac Delco, I'll happily run those. If one of my Hondas needs em, I'll go with ngk or Denso etc.
I won’t claim that NGK/Denso are the absolute best spark plugs, but for import cars I wouldn’t even consider using any other brands. Take from that what you will. Honda’s OEM plugs are manufactured by NGK (believe Toyota uses Denso) so that’s the best to replace it with for OEM or better performance.
Needs a valve job. Common on those engines.
It likes to play pick-a-boo
⭐️
Every time your video ends I feel my CZcams messed up, give us closure please
He kinda knew what to do so maybe shorted wire or faulty injector?
that wouldn't cause low compression it's most likely to be bad valves or a bad piston rings
You didn't disconnect the injectors or the fuel pump for that compression test. You can do a clear flood, too, but you didn't do that either... you definitely did the compression test wrong.
Once again the client FAILS to devulge to Parker that the engine is USED. Did you hear that the client didn't say anything when Parker pointed that out???? It kills me how people deliberately leave important information out when speaking with mechanics. That engine probably has mechanical failures and he tried throwing spark plugs, coils and a whole throttle body at it. Classic GM!!!
sounded like he bought it with the engine swapped already and didn't know much to me, yeah sounds like mechanical issues with that cyclinder.
@@derekp6636 True, maybe he didn't know. It's possible. BUT this client does seem to be more educated than most on this channel so i felt based on his answer to Parker, that he knew.
@@klwthe3rd He literally said he didn't know and bought it with the engine already in it.
Probably not gaped, right
Head casket?
Never mind bad valves
Let me guess head gasket issue or clogged fuel injector before even finishing the video just my guess
Damn boi needs a new engine 😅
Second brah!
Could it be that the sparks plug weren’t pregapped correctly and after 3 weeks it cause a cylinder to leak?
I was wondering about that? All plugs say they come "pre gaped" but often they are off from specs. Good call.
@@klwthe3rd no because he did a pressure test and cyl 1 and 4 were leaking
I see the problem….its a Chevy
Anyone know why a 3800 would idle rough in park but not in drive?
I'm an older woman who is not a mechanic, and I know very little about cars, but I had a similar issue with a Dodge Dakota. It turned out it was the oxygen sensor. Just a thought.
@grumpyoldman7948 thank you for the reply
3800's are amazing engines. Not sure what series 3800 you have, 1, 2 or 3.
@@klwthe3rd series 2 supercharged in a 2004 Buick Park Avenue Ultra.
I swear I just read "anyone know why a 3800 would idle in park but not in drive" I was about to say. How dumb of a question..lol
So what does that mean engine is fine??
no lol engine is done, cylinder one compression is gone
Cyl 1 is leaking badly, 2 and 3 are ok and cyl 4 is also low on compression. Needs at the very least head needs to come off. Prob some burnt or bent valves. Doubt it’s the cyl themselves with it running like that. Can’t know until you scope it or remove the head and look.
@@mik3ymomo that point it aint worth it, scrap it and get a honda or toyota
@@Unknown77710 I hear ya but poor is poor. Every 100 dollars count. I grew up around that environment. Thankfully I found success and moved far away from it but the struggle is real.
@@mik3ymomo Why does a leaking cylinder cause a misfire?
Mass air flow will do this. So will intake gasket
You can remove the entire intake manifold. You have can a bare nut block on the shop floor with nothing more than a cylinder head on it. You can perfect compression all cross, or low unbalanced compression like this motor needing valve job.
MAF, intake gasket will not affect engine compression.
Faulty MAF will cause incorrect fuel trim( rich/lean/stall condition)
Same as leaky intake and low intake vacuum.
We are talking about the base condition of the engine, cylinder wear, pistons, piston rings, valve and cylinder head sealing.
Unless you meant head gasket, but that wouldn't effect cylinder #1 and #4, it would have to be an adjacent cylinder to effect each other.
@@MarkHorn-td9mh I watched the video up to the point where he found multiple misfires and the dude said the plugs have been replaced. My post was referring to having a multiple misfire issue sorry.
@@monsterdong7520 no problem homie, we good
Boring, why is CZcams showing me this garbage.