legacycentral bbs

Well I just finished wiring up my car. Its a '01 Impreza L, which I dropped a '92 Legacy ej22e ecu in - with the full wire harness from ecu to engine. I spliced into my stock harness for power, grounds, and couple other things like starter sw, ac switch,ignition, etc.

But now for my problem - at the ignitor I am getting 12v on all 4wires (from ecu and to coil pack), as well as at the coil pack I am getting 12v (on the yellow wire). I have re-checked all my wiring and where I should only be getting 5v I am getting 12v (sensor pwr on my stock wire harness).

I am also getting 12v at the injectors. This with with the key at the "ON" position but engine not running. Also after about a minute the external ignitor smokes and is extremely hot to touch. It does still work as I plugged it into a friends legacy and her car starts right up.

When I crank the engine it cranks and cranks but will not start - I am assuming this is due to the wiring issue.

Anyone know what the voltage readings should be at those sensors? My wiring diagram says it should only be 5v but I am getting 12v from the sensor pwr line on my stock harness.


-- I have read other threads and checked everything that was suggested in those threads.

I believe there was a mysterious ground wire for the ignitor referenced in some other swap threads that had caused some issues.

There is a diode that also has caused issues..

That ignitor shouldn't be smoking.....

What sensor voltages are you wanting?

Have you traced/verified all your wiring from the ECU pins to the sensor connector pins?

I'm pretty sure the 12v at the injectors is normal with the key on. They work in a negative trigger rest at 12 volts state.

Mike is correct, you will have 12v at the injectors with the key on.

Legacy777 wrote: There is a diode that also has caused issues..

The diode issue relates to not getting 12v at the injectors - he's good there.

I think there's some problem between the way the new style integrated coil/ignitor is wired vs. the old style.