I recently performed an OBD1 JDM D15B swap on my 1990 CRX base model. It was originally DPFI and is now MPFI (done correctly).

Using:
OEM harness
OBD1 Injectors added with no resistor box
OBD1 Dist.
Jumper harness to OBD1
Stock P28
Stock trans
Pinned correctly to the ECU
4 wire o2
Outer TPS wires switched
Motor ran perfect in an EG chassis

The motor turns over strong and starts for a brief second and dies/ sputters. I have raw fuel exiting the exhaust and i do have spark. My fuel pump continues to prime and does not shut off after 3-4 seconds. It's as if I am getting too much fuel causing the cylinders to flood and soaking my plugs. Any help is appreciated.

 

I will have pictures and video in a bit on how the harness was run, Etc. I may also try a functional main relay to see if that's my issue.

 

I'm having similar problem with my 90 crx with z6 and dpfi to obd1 swap. I have a continuous CEL and it sounds like the fuel pump never stops priming and also had fuel coming out of exhaust. Using a p28 ecu, d16z6 distributor(td42u), 4-wire o2 sensor and obd0 to obd1 jumper. I'll let you know if i figure this out.

 

I figured it out a long time ago and sold the car.

 

Was something grounded out?

Why not just answer it instead of just saying, "I figured it out..." lol....

 

Yep it was a ground issues.

 

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