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Old 06-10-2022, 02:33 PM   #10
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Quote:
Originally Posted by Steelepuls View Post
Kevin, I had the same issue with my 01S, where the first start is cold it has no problems turning over, but after a short stop to get gas or pickup food, the restart is slow. When I leave it for over an hour or two inbetween stops, the problem is not as noticeable. It isn't a battery issue or alternator, since those two were replaced recently with new parts. I've read here that the alternator wiring harness is heat soaked and causes the slow turnover.
I haven't confirmed that since i haven't fixed this yet in my car since it has always started, albeit slow. The harness is not too expensive, but I've heard it is a bear to replace.
The alternator and its harness play absolutely no role in the starting process; what you are describing is a classic case of voltage drop cross primary battery cables that are corroded either internally or at the terminals and showing increasing resistance when either warm or hot. You can prove this to yourself by simply running a voltage drop test on the cables; anything more than 0.5 volt drop and the cables need to be replaced.
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