1980 Tachometer

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Jun 26, 2003 | 01:46 PM

azswede1960

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From: St. Pete Beach FL

1980 Tachometer

HELP - tach not working.....please tell me what to check before I tear the whole thing apart. It doesn't work at all (shows 0 rpm when running) and jumps to 15-20 when engine goes off.

Jun 26, 2003 | 08:42 PM

terry82

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From: columbia city in

Re: 1980 Tachometer (azswede1960)

first check to see if its pluged in to distributor cap ,then check if tach filter is okay , if all that checks out you will have to get behind the dash .mid america book page 3-126 has rebuild kits for $99.99

[Modified by terry82, 7:52 PM 6/26/2003]

Jun 27, 2003 | 12:51 AM

BSeery

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From: Exiled to Richmond, VA - Finally sold my house in Murfreesboro, TN ?? Corner of "Bumf*&k and 'You've got a purdy mouth'."

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Re: 1980 Tachometer (terry82)

I think Ecklers has them cheaper - like $75 ish.

Jun 27, 2003 | 02:31 PM

Col-UK

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From: Tilehurst Reading

Re: 1980 Tachometer (azswede1960)

There is a cicuit board on the back of the tacho. Aparently they are prone to failure.

Jun 27, 2003 | 08:57 PM

azswede1960

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From: St. Pete Beach FL

Re: 1980 Tachometer (terry82)

Hi Terry - there is a connection to the distributor, and then there is a connector hanging off that (hmmmmm), is that the "filter" that should be connected there and what does the filter do?

Jun 27, 2003 | 10:17 PM

terry82

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From: columbia city in

Re: 1980 Tachometer (azswede1960)

theres a wire coming from the distributer to the filter [ it looks like a old condenser] then it goes to the circuit board in the back of the dash . the filter is suppose to keep the tach needle from jumping around alot sort of smooth it out.the tach will work with out it.the circuit board seems to be the thing that goes out the most . theres a replacement for that but i dont see any filter replacements.

Jun 28, 2003 | 01:06 AM

BSeery

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Re: 1980 Tachometer (azswede1960)

Quote:

Hi Terry - there is a connection to the distributor, and then there is a connector hanging off that (hmmmmm), is that the "filter" that should be connected there and what does the filter do?

There is a spare connector on the wiring harness to plug in a hand held tach. This is helpful for mechanics doing tune-ups when setting idle and timing. Also a good place to wire in a tach to verify how accurate the dash tach really isn't.