Alternators
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What can cause a 91 lumina 31L to die while the car is in drive Changed the battery changed the battery wires and connectors checked the alternator?

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2006-02-17 21:25:36
2006-02-17 21:25:36

Perhaps your tranny is stalling the engine. My '90 APV (automatic tranny) years ago developed a problem where the engine would die just as I came to a stop at the end of highway off-ramp. It acted just like a manual transmission would if you came to a stop without pushing in the clutch; it stalled the engine. This problem developed within a couple of days of my having a fast-lube-oil-change shop do a "transmission power flush". After much checking around I discovered that the tranny has a highway overdrive mode where the transmission torque converter 'locks' so that there's no slippage in the converter, thereby inproving gas mileage. Doing a transmission flush loosens all kinds of particles that had previously settled out of the way, not causing any problems at all. These particles likely caused some valve in the tranny to malfunction. The warning I got from the tranny expert was to never never do a transmission flush on an old tranny, one with lotsa miles. The converter 'locking' mechanism is apparently electrically operated. I found where the electrical cable connects to the tranny, and I unplugged it. The problem ceased immediately. Several months later, I re-connected the cable. Within a few days I had the problem again, so I pulled the plug again. That was about 8-9 years ago. I don't get the fuel savings of overdrive mode, but then I haven't had any more tranny issues either. BTW, my APV tranny now has 421000+ miles on it. (1 engine rebuild, at 287k miles.) The car dies in drive so you changed the battery and the alternator. I'm totally confused. Sounds like it starts fine and runs fine. But as soon as you put it in drive, it dies?

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