Tachometer Question
Thread Starter
3rd Gear
Joined: May 2016
Posts: 3
Likes: 0
From: Cross City Fl
Tachometer Question
Hello All!
Recently purchased a 1980 Corvette and Tach was working fine. Tach becomes active when car is started and responds to engine revving; however, the tach appears to be reading 1400 rpm higher than normal. It idles showing 2200 rpm. This started shortly after I changed the thermostat, but this should be irrelevant. Any thoughts or recommendations? Thanks!
Recently purchased a 1980 Corvette and Tach was working fine. Tach becomes active when car is started and responds to engine revving; however, the tach appears to be reading 1400 rpm higher than normal. It idles showing 2200 rpm. This started shortly after I changed the thermostat, but this should be irrelevant. Any thoughts or recommendations? Thanks!
Racer
Joined: Dec 2014
Posts: 374
Likes: 42
From: Coldwater Mi
Needle on tach SHOULD go to ZERO when ignition switch it turned to ON position, without engine running....if it's not, then you'll hafta pull the cover off & pull the needle straight out....carefully, and set it to read ZERO. If it doesn't react good after that, then you'll prolly hafta change the filter on the distributor, and/or install a new circuit board on the tach.....I did both, got from Willcox. Unless the '80 is a different setup than my '79.....(My tach was stuck on 4,000 rpm, so I HADTA do this to make it work!)
Thread Starter
3rd Gear
Joined: May 2016
Posts: 3
Likes: 0
From: Cross City Fl
Needle on tach SHOULD go to ZERO when ignition switch it turned to ON position, without engine running....if it's not, then you'll hafta pull the cover off & pull the needle straight out....carefully, and set it to read ZERO. If it doesn't react good after that, then you'll prolly hafta change the filter on the distributor, and/or install a new circuit board on the tach.....I did both, got from Willcox. Unless the '80 is a different setup than my '79.....(My tach was stuck on 4,000 rpm, so I HADTA do this to make it work!)
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,847
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Hello All!
Recently purchased a 1980 Corvette and Tach was working fine. Tach becomes active when car is started and responds to engine revving; however, the tach appears to be reading 1400 rpm higher than normal. It idles showing 2200 rpm. This started shortly after I changed the thermostat, but this should be irrelevant. Any thoughts or recommendations? Thanks!
Recently purchased a 1980 Corvette and Tach was working fine. Tach becomes active when car is started and responds to engine revving; however, the tach appears to be reading 1400 rpm higher than normal. It idles showing 2200 rpm. This started shortly after I changed the thermostat, but this should be irrelevant. Any thoughts or recommendations? Thanks!
More than likely you need a tach board.... https://willcoxcorvette.com/corvette...80-82-usa-made
Willcox
Thread Starter
3rd Gear
Joined: May 2016
Posts: 3
Likes: 0
From: Cross City Fl
It is not relevant to the thermostat change.. Like mentioned above, when the key is turned on the tach should go to zero... Does it do this?
More than likely you need a tach board.... https://willcoxcorvette.com/corvette...80-82-usa-made
Willcox
More than likely you need a tach board.... https://willcoxcorvette.com/corvette...80-82-usa-made
Willcox
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,847
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Here is how you get the tach out of the car with ease.
1978-1982 Corvette Tachometer Testing, Removal, Board Installation
Willcox
