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09-19-2011
So I have a random issue. Sometimes, for no reason at all my car will misfire like a mofo and barely chug along unless I mash the gas then it runs fine, no misfire. But if I just drive normal it chugs and chugs. Then the problem goes away. No cell....I'm lost on this one
09-19-2011
I had a similar problems and I deleted the EGR and all my problems went away...
09-19-2011
Might have to do that. Just makes emissions a pita
09-19-2011
Yeah, Lucky for me I live in MI where there are no emissions testing. If you have a tuner I have a good idea how to get away with it...
09-19-2011
your dam sure the plugs not broke in anyway or you have a bad wire????
09-19-2011
take a spray bottle with a salt water mix and soak down the engine and look for arcs and see if anything changes and do it all night or just somewhere dark
09-19-2011
I had the same exact problem with my car. had random misfire and went away and came back off and on. replaced plugs wires (needed done anyways). checked all the coils. i went through everything. then a lean code came up. checked all vac lines with carb clean. absolutely nothing and still had the random misfire. Started with the carb clean again and sprayed right under the s/c snout. s/c gasket was leaking. replaced it and everything went away. what was weird is that the lean code never came up for a good week or 2 after it all started lol. Not saying thats whats going on with you just thought it was interesting that the random misfire on 6 was the only code it threw lol
09-19-2011
ive checked for vac leaks. couldnt find any. plugs are a week old. checked them all they are fine. checked wires as well. coils are fine. ignition plate is golden....tried everything i could think of to produce the problem and it just does it when it wants to. drove over 300 miles today...freaking retarded
09-19-2011
Mine does this. I also haven't found a solution. No vac leaks.
Things I've replaced:
MAF
Wires
Plugs
Coils
I think I'm going to re-gap my plugs and try again.
Originally Posted by W-Body Store
09-19-2011
im gonna try deleteing the egr and see if that helps. also replace my 02...for the like 50th time. but for now im just gonna drink a bunch of soco and pretend i have a ctsv in my garage instead
Last edited by boostedcompg; 09-19-2011 at 08:23 PM.
09-19-2011
Don't replace anything unless you need to....is the TB all gunked up? Have you ever cleaned it? With no CEL its kinda tough to even get an idea of where to start since you've checked all the obvious wbody issues....
09-19-2011
the tb is fine. might try switchin it out seein as i have another to see if that fixes it though
09-20-2011
Sounds ignition related.
Start with plugs and wires usually.
Move on to checking vacuum leaks if you think they can exist
Always clean the coil towers if they are cruddy
Then consider swapping the ICM with a known good one. ICM's can cause a single cylinder misfire. It's not common, but can happen.
09-20-2011
All cylinders misfire when the problem exists
09-21-2011
Your cat could be plugged! Had the same engine code and symptoms on my wife's Grand AM GT when hers was plugged.
09-21-2011
All cylinders you say?
Check fuel pressure with a lengthened gauge to drive around and watch.
09-21-2011
He has pacesetters and full exhaust...I doube he is running a converter.
09-21-2011
a multiple misfire under high load will typically be related to extreme rich conditions in my experience.
09-21-2011
Or lean
09-21-2011
But lean...is mean lol
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