Contour Enthusiasts Group Archives Forums General Troubleshooting my "CHECK ENGINE" is on (URGENT please)

I don't know much about it as I am not familiar with eec-iv all that well.

I konw the octane adjust circuit is a little gray jumper plug on the 95's near the ignition coils that allows the pcm to ramp up the timing if no detonation is present. If you pull the plug you take away the pcm's ability to ramp up the timing. This is how it was explained to me. My only guess is your neutral pressure switch has a fault and its causing the pcm to stop advancing the timing for some reason.
Try examining the switch first.
Sorry I can't help, someone who knows whats up my come on here.