misfire?
10-17-2011, 12:16 AM
#1
Staging Lane
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misfire? hey guys, i got an 04gto, i just cammed, 224r .600 lift. she drove great for the past 2 days and all of a sudden i take a 3 hour cruise and im misfiring like crazy. cyl 3 plug wire seemed like it popped off way to easy when i pulled on it unlike all the others so i plugged it back in and still missing. any ideas? maybe a common issue? i also have msd ign. coils. and the only code i have is p0300 - random misfire....
10-24-2011, 02:08 AM
#4
On The Tree
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Random or multiple misfires are usually blamed on cam to crank timing sync issues. On camshaft installs depending on how aggressive the cam, a p0300 is picked up due to the extended duration. That is why most people delete that code, however in your case of it missing like crazy all of a sudden is not normal. My question is did you pull the motor when you did the cam install or did you do it in the car? I see it all the time, even on header installs, where the harness of the crank positioning sensor has been torn, pinched or pulled. I would check that out before pulling out your hair on what else it could be. Hope you figure it out bud.
11-07-2011, 09:02 AM
#5
Teching In
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I am having same problem I have a 02 z28 I am getting random missfire but only cylinder 1 .... I've checked plugs wires coils wireing to coils I've done compression test on cylinder ive looked for intake leakage...... I'm stumped I think my last option is a bad valve or spring I'm wanting to do head and cam work but want to make sure its up to par b4 I buy things and need to buy others any ideas
11-07-2011, 09:06 AM
#6
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And yea its a 2002 z28 with minor bolt on mods I have
Lts , off road y pipe
K&n that's about it for engine mods ...... Car is stock besides that I hope I can figure this out had a list of parts ready to order but can't untill I figure this out
Lts , off road y pipe
K&n that's about it for engine mods ...... Car is stock besides that I hope I can figure this out had a list of parts ready to order but can't untill I figure this out
11-07-2011, 09:14 AM
#7
Staging Lane
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Mine turned out to be cyl.3 coil. I still get p0300 cause of the cam. The car is not properly tuned either.... I got locked out of my pcmcia some how. It tells me the software is not able to be updated. This is using a diablo pred. Sport. I got a comp cam 224r .600 lift ground by Texas speed.
