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77 Tach problems

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Old Jul 10, 2003 | 10:54 AM
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Default 77 Tach problems

The tach in my 77 sits at approx. 1500 RPM, it actually bounces up and down from 1500 to 2000 no matter where the engine RPM is. I read some other threads about the filter for the tach. Where would I find it and what does it look like? Any suggestions to fix or what to check would be greatly appreciated.
Thanks :cheers:
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Old Jul 10, 2003 | 12:47 PM
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Default Re: 77 Tach problems (Jeffski)

Nobody????

I was looking through faq but couldn't see anything there.
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Old Jul 10, 2003 | 01:04 PM
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Default Re: 77 Tach problems (Jeffski)

I"d like to know that answer also, mine is also stuck there. My vette"s a '70 with the electric tach, If I get the chance I"ll call the local vette shop and ask them, let you know. :banghead:
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Old Jul 10, 2003 | 01:05 PM
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St. Jude Donor '05-'08
Default Re: 77 Tach problems (Jeffski)

I do not think that is a common problem. I have not had it. I'm not sure about the filter either. I had a small problem once with the tach. It would act like it was not working, then it would spike every now and then. Turned out that there is a wire that connects into this little spherical thing (i guess this might be the filter). My wire was barely hanging on by a thread, literally. I just resoldered it on and problem solved. I can try to take a picture if you want, although it may be a few days.
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