we got a 95 z28, came in ran like crap. they had jus replaced the motor. had sum vacuum hoses crossed and the manifold wuz sucking stuff out of the charcoal canister and the opti-spark needed replacement. so, the hoses were correctly installed, canister replaced, opti-spark replaced, and the map, now we replaced the coil and coil module, the maf and maf connector. the problem we had was under light accel it wud be ok but under heavy throttle it wuz bog down and then pick up and move. after all the above was changed the problem still exists. and of course it has new wires n plugs cuz it wuz the motor is new. we had a spark plug tester coming off the coil and while power braking the spark wuz very weak, so that is y the coil and module were replaced. wt are we over looking and if any1 has any sugs it wud be great. and no lights on, has a miss code i believe and a evap code.

 

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