Ok so just a month ago I have bought a 1990 DX CRX. It already had a B18a1 swap put in it, but needed wired. It came with a wiring harness allready in it, injector resistor box already wired, injectors already wired. The crank angle sensor wasn't wired at the time, so me and my cousin added two more wires to down to the ecu. He's done these types of swap many times and finished wiring up my car. But when we turned it over nothing. Previously we'd checked, the main relay, fuel pump, fuses, and power to the ecu. We came up with that the engine is getting no spark, no fuel (fuel pump works), and no injector signals, and the ecu is getting power. Recently he'd delivered two ecus, one being a DPFI and a MPFI. One is a PM8 and the other is a PM5. None of my three OBD0 ecus work, but a OBD1 ecu also came with the car, so I got one PR4 OBD0 and one PR4 OBD1 ecu with it. The engine looks to be a 91. Right now im puzzled upon what to check, any help or suggestions would be much appreciated.

 

Are you using obd1 injectors with the resistor box?

 

The no spark and no voltage to the injectors is due to the improper wiring at the distributor, especially the TDC sensor. If the ecu doesn't get the proper signal from the distributor telling it when the engine is at TDC, it won't fire.

Here are links to the OBDO-OBDI wiring pinouts from the faq. I'm not sure if your car has been converted to OBDI, but either way fix your distributor wiring.

distributor wiring
https://honda-tech.com/zerothread?id=1349052

ecu pinout
https://honda-tech.com/zero...age=1

 

ok, well, im not sure how to tell the difference in injectors, obd1 to obd0 that is.

but thanks for the links


Modified by H Rookie at 10:08 AM 8/23/2008