95 z28 runs fine under normal driving conditons but if i really get on it in first or second gear it misses and bucks like hell.

So far ive replaced

opti, plugs , regulator, pump, and filter

Anyone have any suggestions???

 

any codes stored or showing?could be a multitude of things.would check for stored codes first though

 

Nope the light isnt on.. Im gonna take it and get a scanner put on it tomorrow hopefully something will be in there. But if not i dunno where to start if there isnt.. Was thinking maybe the control module, but seems to me like it would act up under all driving conditions if that were the case.

 

ignition control modules are funny little critters.they can just go out point blank or can go out when warmed up.changed wires lately?coil?have adequate fuel pressure?

 

surely you didn't replace all those parts chasing this problem????

Please share with us what was going on before you tossed those parts at the car, or, were they replaced piecemeal over some period of months for other reasons?

 

almost always a reason to start throwing parts so as torque says..."please do share"

 

I purchaced the car last week not running the other parts were replaced due to bad fuel pressure and a bad opti , today was the first time ive ever really driven the car..Got her running sunday night was unable to get tags till today.. So havent really been after this issue quite yet, gonna put the scanner and a coil on it tomorrow and see what happens... Thanks dc

 

did you buy it as a "non running vehicle"?

 

even if it drove down the road and then died, used car sales tend to be "as is" with no warranty; caveat emptor

OK, back to ski

check the basics first

check every spark plug. If needed, replace them. Check/replace plug wires

reseat the opti harness cable (the one that feeds into the top)

clean the MAF

inspect for vacuum leaks


at least it's now running