Started up the new motor this weekend. Had an instant SES light on. Car isn't tuned yet for this setup, but was tuned for last setup(355/ported heads/cc305). We used the old opti, wasn't having any problems before. Little help?

95 Z28
385
Ported stock heads and intake 2.02/1.60
58 mm TB
42lb SVOs
Lunati 60123

Thanks
Sean

 

36 is inconsequential at this point. Concentrate on the 42 which is the IC signal on the white wire between the ICM and black PCM connector pin 5. First thing to check is the number 11 fuse 10amp UH. If that's good, measure voltage on the pink/black wire and the white/black wire at the ICM with KOEO. Be sure the black wire at the ICM is grounded properly.

Then get to the opti feedback signal after you take care of the 42