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Re: Voltage drop with ACC cycling on 97 Aero, starter cranking ... Posted by Ari [Email] ![]() ![]() In Reply to: Voltage drop with ACC cycling on 97 Aero, starter cranking ..., John Fitzgerald ![]() ![]() |
I support the bad connection theory. The alternator does supply power for the car when the engine is running, but the battery is there to source large current spikes.
Try this for slow starting - hold the throttle about half-way open. Yes, I know every manual for a FI car says start it with your foot off the pedal. But try it - just be ready to release the pedal when the engine catches. An engine is just a pump, and it takes a lot of energy to pump against a closed throttle. With the throttle open, the engine will spin faster with the same amount of energy.
But all of that still points to a bad connection (or more). Make sure the contacts between the battery cable clamps and the battery posts are clean and bright - not on the outside, but on the mating surfaces. Peek inside the insulation at the end of the battery cable - do you see a whitish or greenish powder? If so, replace the cable. Make sure the OTHER end of the cable has a good connection - the chassis ground, the alternator, the starter, and the rest of the system. I don't have an electrical manual for a '97, but there is probably one major relay supplying power to the rest of the car. Dirty contacts mean a power drop. But most likely it's a voltage drop across a bad ground connection.
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