Hi all...hoping for some "been there done that" advice.
89 SC 5 speed
Sat for 14+ years after a rebuild of motor
Was running when parked and was moved a couple of times under it's own power but then sat for years
It won't start. Not even a hint of combustion. Here's what Ive done so far:
Changed fuel pump, filter, fresh fuel
Fuel pressure at shraeder valve on rail is 40psi
Spark on all 6 posts of coil pack
Noid light is flashing on injector 1 (or is it 4?) (haven't tested all injectors yet, but again not even a hint of firing.
Tried a known good DIS. No change
Tried a known good '89 ECU. No change
Only ECU code I've seen is 95 (Fuel pump circuit open, ECA to motor)
Fuel pump IS running momentarily when turning key and pressure is consistent during cranking.
My current suspicion is that there's a ground corroded or insufficient or just plain missing because oof that error code and the engine being reinstalled right before it was parked. The install doesn't look too great so a missing ground strap would not surprise me, but it did run after the engine was put back in.
Does anyone have some suggestions for next tests, or perhaps info on where/how engine should be grounded (factory locations or better)?
Thanks much in advance. Hope there's lots of folks still here. Surviving MN12s are getting rarer every year.
Kevin
89 SC 5 speed
Sat for 14+ years after a rebuild of motor
Was running when parked and was moved a couple of times under it's own power but then sat for years
It won't start. Not even a hint of combustion. Here's what Ive done so far:
Changed fuel pump, filter, fresh fuel
Fuel pressure at shraeder valve on rail is 40psi
Spark on all 6 posts of coil pack
Noid light is flashing on injector 1 (or is it 4?) (haven't tested all injectors yet, but again not even a hint of firing.
Tried a known good DIS. No change
Tried a known good '89 ECU. No change
Only ECU code I've seen is 95 (Fuel pump circuit open, ECA to motor)
Fuel pump IS running momentarily when turning key and pressure is consistent during cranking.
My current suspicion is that there's a ground corroded or insufficient or just plain missing because oof that error code and the engine being reinstalled right before it was parked. The install doesn't look too great so a missing ground strap would not surprise me, but it did run after the engine was put back in.
Does anyone have some suggestions for next tests, or perhaps info on where/how engine should be grounded (factory locations or better)?
Thanks much in advance. Hope there's lots of folks still here. Surviving MN12s are getting rarer every year.
Kevin
Last edited: