Tachometer Troubles
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Heel & Toe
Joined: Jul 2014
Posts: 20
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From: Hico Texas
Tachometer Troubles
On my 79 when I bought it the tach would read zero with the key on, but with the engine started it would always read way high. At 70 mph the tach would be pegged past 7000 rpm. Simple fix right, replace the circuit board! I finally ordered a board for 78-79 and I replaced it yesterday. With the key on it pegged below zero and stayed there. What are the odds that this new board is defective? Reinstalled original board and the reading high issue is still present so I didn't smoke anything. Has anyone seen this problem with a new board? Any ideas would be appreciated.
Former Vendor
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From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
On my 79 when I bought it the tach would read zero with the key on, but with the engine started it would always read way high. At 70 mph the tach would be pegged past 7000 rpm. Simple fix right, replace the circuit board! I finally ordered a board for 78-79 and I replaced it yesterday. With the key on it pegged below zero and stayed there. What are the odds that this new board is defective? Reinstalled original board and the reading high issue is still present so I didn't smoke anything. Has anyone seen this problem with a new board? Any ideas would be appreciated.
Tach Board installation 1978-1982
Corvette Tachometer Board Installation Instructions 1978-1982
Corvette Tachometer Testing, Removal, Board Installation, Video Link 1978-1982
Thread Starter
Heel & Toe
Joined: Jul 2014
Posts: 20
Likes: 0
From: Hico Texas
Checked the tach filter seems to be working. Sent the board back awaiting a replacement and received the new needle. The needle looks the same as the original one but when it is on the tach shaft it does not go on tight. The hole is obviously larger. The needle falls off. Contacted Ecklers and they said it should be correct for a 79 and are sending me a new one. Almost a 3 week experience trying to get this tach working so far. If I order a new 79 L82 tach will it come with the board and needle pointer already installed?
