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Old 05-04-2008, 21:28   #16
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Ok will not disconnect tach
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Old 06-04-2008, 01:59   #17
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2Hulls has good advice for this situation. I also supect a connection problem. Maybe at the tach itself or the sender. Which could be the Alternator of course.
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Old 06-04-2008, 10:38   #18
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Originally Posted by Alan Wheeler View Post
2Hulls has good advice for this situation. I also supect a connection problem. Maybe at the tach itself or the sender. Which could be the Alternator of course.

Maybe it senses from the alternator and the alternator is slipping?
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Old 06-04-2008, 13:29   #19
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Originally Posted by Leighton
I've had the same probem for 5 years. Spend thousands on injector overhauls and replumbing the fuel supply and still It will faulter and sometimes stop for no apparent reason.
I suspect its a simple problem but just can't find it - a small air leak is favorite.

Good luck and I'll follow the thread with intest.

In those thousands have you changed the tach itself or the wiring?




Yes - even tried a strobe tach. The RPM drop was audable and therefore real.
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Old 06-04-2008, 14:52   #20
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2Hulls has good advice for this situation. I also supect a connection problem. Maybe at the tach itself or the sender. Which could be the Alternator of course.

Immortalize this thread. We caught Wheels with his knowledge down :lol:

GM series tach's are not driven by the alternator on a factory installation. the are driven off of a flywheel hall effect sending unit. These connections frequently get loose.
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Old 07-04-2008, 01:40   #21
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Immortalize this thread.
Hey if I am supposed to be so damn clever, how come I ain't rich like Bill Gates.
Sorry, after 16 posts I didn't remember it was a GM series. Harrrr, I wouldn't have known that even if I did know it was a GM series. Remember Pat. You get to play with the puppies. I just get to teach it to a bunch of dropkicks. There's a big difference there.
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