Silentkillzr Posted August 22, 2013 Report Posted August 22, 2013 95 3100 SE GP, Runs decent half the time, missfires and dies the other half. Sounds like its running on not all cyl. Burns a blackish/greyish smoke. Slight smell of oil but not exactly, weird smell, almost reminds me of tranny fluid burning. Was out of oil when i got to it, put some in and ran a little better, the intake tube popped off too but i remounted it. Any clues or ideas guys? Quote
RobertISaar Posted August 22, 2013 Report Posted August 22, 2013 a dying ICM or coilpack(s) could certainly do it. Quote
19Cutlass94 Posted August 22, 2013 Report Posted August 22, 2013 When it runs decent, is the motor hot or cold? Quote
Silentkillzr Posted August 22, 2013 Author Report Posted August 22, 2013 Colder mainly but did it when it was warm a couple times Sent from my Galaxy Nexus using Tapatalk 2 Quote
Silentkillzr Posted August 22, 2013 Author Report Posted August 22, 2013 And of course started fine dead cold. Wtf GP! Sent from my Galaxy Nexus using Tapatalk 2 Quote
white4d96 Posted August 22, 2013 Report Posted August 22, 2013 I had a similar issue. Eventually found a weep from the corner of my LIM. LIMG failure or warped intake possibly. Quote
Silentkillzr Posted August 23, 2013 Author Report Posted August 23, 2013 Changed plugs. They were pretty white but no damage. Ran fine cold drove it till warm and boom it happened again. I'm really leaning to coils, going to swap the ones off my car tomorrow to try and see. Sent from my Galaxy Nexus using Tapatalk 2 Quote
Galaxie500XL Posted August 23, 2013 Report Posted August 23, 2013 Coil is a reasonable possibility...if you lose one on a DIS system, you lose two cylinders...they don't run so well on 4. Had a similar problem with mine about a year ago, turned out there was a crack in the ignition control module, and some moisture had crept in there. As the engine warmed, the moisture flashed to steam, and caused all sorts of weirdness. Quote
RobertISaar Posted August 23, 2013 Report Posted August 23, 2013 i've actually lost half of a coilpack before.... it was an odd thing to diagnose. suspected dead side of the coil was on a rear cylinder, so i swapped the coil ends of the plug wires around and had it fire on it's front cylinder companion, where the good side of the coil would arc a couple of inches, the dead side was intermittent and had much less distance. Quote
Silentkillzr Posted August 25, 2013 Author Report Posted August 25, 2013 Coil packs and ICM are good i believe, i swapped mine and still has the same misfire issue, i got a log here for those who can read it: http://specbar.net/wbody/Misfire95PRIX.xdl Quote
RobertISaar Posted August 25, 2013 Report Posted August 25, 2013 you have a history DTC33 (MAP high). not sure what would have caused that or if it would cause any issues, but i would clear it just to remove it from the list of possibilities. seemed to rev cleanly the third time you got into the throttle, the other two, i can see the choppy RPM. Quote
Silentkillzr Posted August 31, 2013 Author Report Posted August 31, 2013 I did the crank pos sensor, and swapped coils and ICM from my car still has problems. Wtf wbody Sent from my Galaxy Nexus using Tapatalk 2 Quote
chevylover95 Posted September 4, 2013 Report Posted September 4, 2013 (edited) hi people,i have a 1995 Chevy lumina 3.1 V6,car was my mother`s, she died , i inherited my problem(s) are as follows:had a intake manifold gasket leak fixed that, found that computer was bad (or so the repair shop says ) had that fixed ,now car sounds like a diesel truck !!! i think it needs a tune up,my question is how do you get to the back three plugs in the engine compartment ? hopefully a tune up will fix this problem. Edited September 5, 2013 by chevylover95 Quote
Garrett Powered Posted September 5, 2013 Report Posted September 5, 2013 I couldn't view the log with my A1 adx. what do I need? Quote
Armybarlow Posted September 5, 2013 Report Posted September 5, 2013 have you tried pulling one spark plug wire at a time to see which cylinders are not contributing? should hear the engine die down when one is pulled. Quote
l67ss Posted September 5, 2013 Report Posted September 5, 2013 Unbolt the dogbones and roll the engine forward hi people,i have a 1995 Chevy lumina 3.1 V6,car was my mother`s, she died , i inherited my problem(s) are as follows:had a intake manifold gasket leak fixed that, found that computeol r was bad (or so the repair shop says ) had that fixed ,now car sounds like a diesel truck think it needs a tune up,my question is how do you get to the back three plugs in the engine compartment ? hopefully a tune up will fix this problem. Quote
RobertISaar Posted September 5, 2013 Report Posted September 5, 2013 I couldn't view the log with my A1 adx. what do I need? the P66 V6 ADX http://wikisend.com/download/405438/P66 V6.adx that's the most current one. Quote
Garrett Powered Posted September 5, 2013 Report Posted September 5, 2013 (edited) oh, thanks Saar, buddy. I just saw I had picked that one up back in april. was date stamped in my downloads, just couldn't find it for some reason. just checked out the log and didn't see any events of the car dying. Thought the voltage was weak at first, but not really.. Edited September 5, 2013 by Garrett Powered nothing too bad Quote
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