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Topic: Another Tach Question

in Forum: C3 Electrical


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Another Tach Question (1/4)
 3/8/12 3:31pm
kcarlasc
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Vette(s):
76 Vette, 383

Joined: 2/20/2012
Posts: 21

So..  have been searching for a bit but have not found anything really the same..
 
When the car is off the tach sits at about 2500...  when the car is runing, the needle does move but no matter the RPM only moves maybe 500 RPM... 
 
Was going to order another board...  but wondering if its just "stuck" or something..
 
 


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Re: Another Tach Question (2/4)
 3/8/12 5:00pm
kcarlasc
Former Member
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Vette(s):
76 Vette, 383

Joined: 2/20/2012
Posts: 21

Woops.. thought I was in the Electrical forum...
 
Mod:  Can you move this to the correct forum?


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Re: Another Tach Question (3/4)
 3/9/12 12:02am
Adams' AppleLifetime Member
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Duncanville, TX - USA

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#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

Joined: 11/8/2003
Posts: 20129

When you turn the key on, does it go to zero, or stay at 2500? If it goes to zero, then you might try changing the tach filter, or even by-passing it, to see if that changes the rpm readout. If it does not, then, yeah...you'll prolly need to replace the circuit board. Fairly common thing, unfortunately.

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Re: Another Tach Question (4/4)
 3/9/12 9:39am
kcarlasc
Former Member
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Vette(s):
76 Vette, 383

Joined: 2/20/2012
Posts: 21

Thanks!!!  It sticks at around 2500.. never ever goes to zero...
 
Will order up a new board...
 
thanks


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