1998 Saturn SC1

Engine Mechanical problem
1998 Saturn SC1 4 cyl Front Wheel Drive Manual

I have a 98 saturn sc1 1.9 single overhead. Cyl 2-3 will only fire sometimes at high rpm. I tried to swich the coils around but still have the same problem. This tells me its not the coils. I would guess its whatever sends the power to the coil. Is there some kind of crankshaft sensor or something? Any input on this issue?
January 29, 2010.

Check and test the sparkplug/compression and injectors for cyl 2/3. If okay this is the time you test the CPS and ICM

Jan 29, 2010.