Thread: misfires may be another issue

ok guys so i have been having a misfire issue at wot...cylinders 3,4,5,6 are misfiring multiple times when i floor it....now i have a intermittent misfire while idling....thought it was ignition related but everything seems alright so i also noticed while accelerating slowly i bog and nose dive like the car is gonna die, almost like im getting no fuel....maybe a clogged fuel filter or injectors hopefully its the cheap filter....ill prob replace the plugs wires and coils while im at it also...could a fuel issue cause what im describing?

If it isn't fuel related I'd be willing to bet your ICM might be taking a crap.

Originally Posted by bluegtp91

If it isn't fuel related I'd be willing to bet your ICM might be taking a crap.

thats my next guess also because i highly doubt all 3 coils would go simultaniously...and for 4 wires to be bad would be weird also...how much is an ICM?

the ICM is different from the coils...if it takes a crap it'll make perfectly good coils seem like dog sh!t...shouldn't be more than like 10 or 20 bucks from Morad.

ok yeah the fuel filter didn't fix it....im gonna get a new icm first along with new wires & plugs hopefully that cures my cars cold

Please just get some AL104's again and gap them all to exactly .05

I didn't even see that...over gapping can cause crazy misfires...

Originally Posted by FoSHO99

Please just get some AL104's again and gap them all to exactly .05

did you mean .50?

Plus if plug gap was causing my misfires wouldn't I have noticed right away after chAnging my plugs

Plug gap wouldn't cause intermittent probs I wouldn't think either

i beginning to lean toward tranny issues....it almost feels like a shift when it bogs...weird....like it bangs as if it shifted but it studders instead....or it could be all 6 cylinders not firing.

UPDATE!!!

ok guys....i have noticed a couple things tonight while scanning....

when i get this bog/bump/bang effect my knock shoots up above 2.0 quick and then will disapate when i let off...and when this bang bog happens i do not show up with any misfires....the bump and misfires are seperate it seems....now where do i start! AHH FML

any body?

plugs should be gapped at .055" .5" is half an inch. Not sure on your problem tho.

Pull out plugs 3,4,5, and 6, and check the gap on all of them. I had a problem years ago where I replaced my plugs and accidentally over-gapped the plug for #4. Everything was fine for the first few days after that, then it just 'randomly' started acting up. I had the plug at .065" instead of .055". $h!t happens...

For the last time, you are running a 3.4 setup which one of the supporting mods is a colder plug. Make sure to get AL104's, gap them PROPERLY at .05-.055 and then try again. When you go from 7psi to 12psi in boost, a colder plug is needed, you are running stock heat range plugs. If it just gets a little better but still misfires, drop down to a .045 gap and try again.

no one can help you if you are unwilling to try some of these things...it is free to inspect and check things and what $2 per plug for new ones...

putting in 104's tomm at .45 or .50 havent decided...and the locking up feelin i was getting was from not doing a case learn after my tune....did a case learn and boom i only have misfires now