Our 75 2.0/FI car has completed a two year restoration that included an engine and transmission rebuild, along with rebuilding or replacing all FI components.
The car runs perfectly all the time until it has been running with electrical load for 30 min (radio w/Bluetooth, rear fan) and then I turn on the headlights. The car immediately starts to sputter and will die unless the lights are turned off, which puts the car back to perfect.
We initially thought that it was a bad ground in the headlight circuit, but cleaned and verified, no red flags there.
Is it possible that the mounting plate for the regulator has a bad connection? I think it is original to the car.
Any help would be greatly appreciated as last week I had no lights coming back from the first cruise.
Thanks
Have you measured voltage under these different load conditions?
Yeah, what van said. I would suspect the regulator just due to recent issues with the old buggers (used and nos) not ever being able to kick good voltage to the battery.
I would also point towards some strange ground issue at the rear. I had quite a bit of luck checking resistance to ground from various points on the motor in my search for low charging issues. Fan shroud to ground, starter, etc.
Thanks for all the feedback! Will report back.
What happens when you turn off the aux fan? Is the idle low when everthing except for the lights are turned off? Does the gen/alt light flicker?
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