Tachometer Help:
Thread Starter
Instructor
Joined: Jan 2009
Posts: 163
Likes: 1
From: Port Allen Louisiana
Tachometer Help:
I have a 1980 Corvette, L82. I had not cranked it in several months. When I crank it, I normally push the pedal all the way down for the choke, and then turn the key. A few days ago, when I turned the key to start, it started up after a couple of seconds. But this time I think the throttle on the carburetor must have stuck and the engine raced up very high quickly, the tach going all the way up to 6000 RPM's. I hit the pedal as fast as I could to unstick it and it came back down to idle. But the needle on the tach stayed up around 6000. After killing the engine, it still stayed at the same place. When I drive it now, it stays up around 4 or 5000. It now never comes back down as it should or work as it should.
Any help on this problem would be greatly appreciated.
Any help on this problem would be greatly appreciated.
Racer
Joined: Nov 2017
Posts: 319
Likes: 125
From: Midwest
I would try first what intepon suggested and see if that works.
When I bought my '79, my tach didn't work very well either. I replaced the flexible printed circuit and the tachometer itself, which also had a new printed circuit board attached. The tachometer has worked great ever since, now going on 10 years. Those three components together cost about $260 today.
If you're trying to save time and effort, then replace all three components at the same time. If you're trying to save money, I would start with a new flexible printed circuit ($65) to see if that fixes the problem.
When I bought my '79, my tach didn't work very well either. I replaced the flexible printed circuit and the tachometer itself, which also had a new printed circuit board attached. The tachometer has worked great ever since, now going on 10 years. Those three components together cost about $260 today.
If you're trying to save time and effort, then replace all three components at the same time. If you're trying to save money, I would start with a new flexible printed circuit ($65) to see if that fixes the problem.
