Tach problem
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 801
Likes: 17
From: Middletown Delaware
Tach problem
I have a 79 with stock ignition with a peged out tach. With ignition on tach pegs out above 7000 then when you start car tach goes to about 3000 rpm and will read very high. It will also peg out when you touch the gas. You think its the circuit board or should I look for something else. Thanks Dave
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
Originally Posted by Dave Witman
I was just under the inpression that the tach board was more for non working tachs which really does not make mush sence anyway.
Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
One other thing, Dave, I put a new board in a '75 which I got from Zip. They told me no adjustments were necessary and to just install it. I later talked to a speedo shop and they said it definitely needed to be set up before installation. I don't know who is right but I did let the shop do its thing because it was such a pita to get to and I didn't want to have to pull it out again. I don't know if yours is adjustable or not. Jud
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Race Director
Joined: Sep 2001
Posts: 10,560
Likes: 439
From: Wellington, FL
St. Jude Donor '11 thru '25
Originally Posted by 80_vette
I would also look at the tach filter.If it ain't working right you won't get good signal at board.I changed both the filter and the board.
Worx perfect now
Worx perfect now
Thread Starter
Burning Brakes
Joined: Oct 2004
Posts: 801
Likes: 17
From: Middletown Delaware
OK I made time today to work on the tach problem.I found the tach filter missing and the circuit board has burn marks also. I ordered both so I should be good to go. Dave