I am having trouble with my friends prelude. When his stock obd2 computer is plugged it shows no codes other than egr. When the Neptune computer is plugged in with the adapter harness it shows a cylinder position sensor code. I checked the harness and ecu on another car and they work perfectly. Also I know the distributor works because we tried two of them, both off of running cars with no CEL's. Has anyone here run into this problem or something similar? I have done the obd2-1 conversions on other cars before and never had an issue when using the obd2 dizzy.

 

Anyone?