Question about 1991 Ford Ranger Supercab
Hello, a quick way to check the alternator is to unplug the battery while the truck is running.
If it shuts off the alternator is junk. if it remains running then the alternator is doing its job.
The tach sounds like it could be a totally different issue but i had a 92 that did the same thing till i changed the alternator,
Have you checked the belts make sure it's in good repair.
Posted on Nov 08, 2010
Testimonial: "changed the alt.,a new mass air flow sen. but when idling , sometimes it still dont act right"
It sounds like the alternator is draining the battery. I would remove the alternator and have it tested at a local parts store. I would also charge the battery and have it tested too.
Posted on Nov 07, 2010
Testimonial: "good advice, thank you. but what about the tach? see the comments i posted afterwards"
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Posted on Jan 02, 2017
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