help meeee

[taterhead007]

is this thresd working?

[taterhead007]

i have a1994 olds cutlass supreme with a 3.1 v-6 car normally runs great...

car misfires especially with acceleration. new plug wires/plugs/dyno checked and all tests performed and that business cant seem to figure it out.
also changed 1 of 3 coils, that had a misfire///Car ran great for a month.
Doing it again now.. Have tried to check spark again, but dont see any problem like before. could it be egr valve? fuel pump? ICM?
Please help!!!!

Taterhead

[maxwedge]

Could it be? Check the fuel pressure for starters, also could be a bad or dirty injector or ign module.

[thisnametooktolong]

What did they charge you for the dyno pull? This is what it could be.
· Low fuel pressure for all the reasons, bad regulator, dirty filter, bad pump, bad pump connector next to the gas tank
· Bad ICM or “crudded” up connector
Bad MAF (tap it with a screwdriver and see if the engine stumbles)
Plugged fuel injectors
Severely dirty air filter will make it chug
A stuck EGR on an OBDI will usually make the car sound like a diesel at idle and cruise, but little or no effect at WOT (clean it, check its operation, or just plug) The OBD I wont toss a code without it working.
After that the only thing that comes to mind is a vacuum/intake leak. You can check that with a vacuum gauge, and spraying WD or starting fluid around the intake, unless it is sucking air from the engine. (But for god sakes dont catch the car on fire)