I have an OBD2B to OBD1 conversion on my car, I recently sold it to a customer because I didn't have any ecu's in stock at the time and he was desperate.
Anyway, it worked perfectly on my car, however on his, also OBD2B, the rev counter doesn't work. I know that OBD1 and OBD2 distributors are technically the same piece, but why has it affected his distributor and not mine?

His rev counter works fine on the OBD2 ecu, just not on the conversion.

Any ideas?

Many thanks

 

shouldn't make any difference at all. I've run my car off of both (obd2b and then obd1 conversion) and both worked w/out changing anything.

 

Exactly, it works perfectly on my car, but not on the customers.

 

sounds like a problem with the customers car...

 

Aye, but the rev counter works fine on OBD2. And on OBD1, he has an apexi RSM and that reads the revs perfectly but the counter doesn't work on the clocks. Its boggling me!

 

how does he have the Apexi wired up... maybe he hacked on the conversion harness and messed something up. Check and make sure all the pins are getting contact in the conversion harness also...

 

Nah, the Apexi was installed before the conversion, its on the OBD2 harness. We've tried 2 harnesses now