i have a 1994 z28 with 38k miles, a few months back, car got a bad miss back firing, missing, smoking. you could not even drive car it was missing so bad. so i replaced distributer cap , i put a new opti-spart cap on car, car still has a dead miss, u can actually drive car but it still has a dead miss somewhere, it does seem like it clears up a little when you up in the rpm, but its still there, check engine light comes on and off saying code (36) hight resistance pulse in injetion system, what next ??? could i got a bad apti- spark?? any help would be appreciated

 

If you only replaced the cap and rotor and not the entire optispark (which includes the optical sensor) you won't fix the problem, if it was the optispark at all.

 

You replaced the cap & rotor only? How did the opti look inside? You won't always see anything wrong with the wheel and resolution sensor if there is a problem with the electronic component. If you only did cap & rotor, you'll unfortunately need to replace the distributor itself. GM (Delphi) is the most preferred unit- you could also try one from Chandler Motorsports (around $140.00 vs. $360.00 for the Delphi). I also put a little red Loc-Tite on the 2 screws that hold the rotor in place. Sometimes they come loose and that's usually pretty destructrive.

 

i replaced the entire opt spark assembly with a dynaspark system and a new coil and ignition module the car runs better but is still not fixed

 

might need one of these:

http://www.eficonnection.com/eficonn...spx?ItemId=865

connects from the opti up the passenger side to about 1/2 way back on the intake. carries hi and lo res signals to the PCM so it can command spark timing appropriately. these connectors get chewed up, dirty, corroded, etc.

 

plugs, wires?

 

the new opti spark came with a new harness so it shouldnt be that