fluctuating tach needle
Thread Starter
Instructor
Joined: Jun 2004
Posts: 233
Likes: 0
From: algonac michigan
fluctuating tach needle
i just replaced mt circuit board on my tach (76 vette)
i put power to it and reinstalled the needle to zero it
it seems to work fine......unless you hammer the throttle
then at about 4000 rpm the thing goes nuts
up and down from 0 to 6000rpm
untill you let off the throttle and then it is fine until you hit it again.
i put power to it and reinstalled the needle to zero it
it seems to work fine......unless you hammer the throttle
then at about 4000 rpm the thing goes nuts
up and down from 0 to 6000rpm
untill you let off the throttle and then it is fine until you hit it again.
Last edited by 76REDSTINGER; Aug 26, 2004 at 04:39 PM. Reason: sp
Drifting
Joined: Oct 2003
Posts: 1,330
Likes: 1
From: Kerrville Texas
The original looks like a condensor and should be located right next to the distributor on the intake. There is a tan? wire coming from the distributor to it.
I just got one from Rodney Dickman you can find him on the web I think I paid $25 but it does not look like the original. He has a reproduction but I think it runs $50.00. It solved the problem that I had which sounds exactly like what you are experiencing.
Good luck, Kona
I just got one from Rodney Dickman you can find him on the web I think I paid $25 but it does not look like the original. He has a reproduction but I think it runs $50.00. It solved the problem that I had which sounds exactly like what you are experiencing.
Good luck, Kona
Race Director
Joined: Jun 2000
Posts: 10,049
Likes: 675
From: FL
Originally Posted by 76REDSTINGER
i found the original
it was on the intake...but there is no wire left coming out of it
also how was it wired in with only the one wire.....it went to where?
R
it was on the intake...but there is no wire left coming out of it
also how was it wired in with only the one wire.....it went to where?
R
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Instructor
Joined: Jul 2004
Posts: 210
Likes: 1
From: Aberdeen NC
I had a similar problem with my 82... I found the capistor was not grounded and the HEI wires were running through some sparkplug wires. Not sure which one fixed it but started the car back up and it has all be fine since.
Melting Slicks
Joined: May 2002
Posts: 2,508
Likes: 0
From: Wisconsin
Yeah, I had to resolder mine as well after I broke one of the leads off. Someone unbolted it from the manifold so it lost its ground so it didn't function. It works now after bolting it down.
Eckler's has an original looking one ($30) and a non original looking one ($60). Madvet has the original style one for cheaper though ($50).
Eckler's has an original looking one ($30) and a non original looking one ($60). Madvet has the original style one for cheaper though ($50).
