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Discussion Starter #1
Using info on this very helpful forum I am troubleshooting non-starting CRX HF. If it turns out to be the ECU, What ECUs will make the car run?

Car ran when parked two years ago. Now has CEL on solid, no power to FP, power to main relay on only one pin. Fuses are all good. So I think it must be ignition switch or ECU. Have a switch to swap in but only ECUs from non PGM Civics, and I don't think those will work. Right?

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A pm6 ecu from a 88-91 si with a d16a6 should be able to run it since its PGMFI, im not sure if the d15b6 being a 8 valve will effect this. Also, I've run a 90-91 ls ecu on a d16a6 and it was fine, not sure if it will run the d15b6.
 

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Thanks for the input. I am in troubleshooting phase and simply want to make it run. If it turns out I need a new ecu I will buy a proper one. I have found supplying twelve volts to the ignition terminal of the Maine relay makes the CEL light go out and puts power to the FP circuit. Have new pump and tank on the way.
 
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