I got a 97 cavalier 2.4 its falling on its face from about 4-6thousnd rpm just spitting and sputtering. I have changed everything possible....
bc97cavalier
 
I do think that more info is going to be needed to help
Kind of a vague statement being made
 
 
Fuel Pump, Fuel Filter, Fuel Rail, Fuel Injectors, Coils, ICM, Computer, throttlebody, TPS, IAC, IAT, Crank shaft positions sensor, Nock Sensor.
bc97cavalier
 
lol.  forget diagnosis, just throw new parts at it.  any codes?  maybe a MAP sensor?

87 Firebird
All stock...........lol.
 
intake gasket

8 psi with m62 and IAT under 100 
 
 
Changed Map, no codes changed intake gasket
bc97cavalier