<VV> unsteady tachometer

[Bruce Schug]

On Feb 6, 2008, at 8:32 PM, John Gull wrote:

> I have a 66 Corsa -140 where the Tachometer bounces around in the 
> higher RPM
> ranges but it is very stead at low RPM. There can be a 500 variance 
> and so I
> am wondering if anyone has experienced this problem and what the 
> remedy is?
>
>

John,

This sounds like a bad ground on the points plate. The symptoms are a 
tach needle that is erratic, moving a bit. The solution is a Vega point 
plate. I tried soldering a ground wire onto the points plate, but the 
Vega plate is the ticket as it is grounded better. I'm pretty sure it's 
a Vega plate, it's been a long time ago. Mine used to move, maybe 200 - 
300 rpm up or down. I don't think mine moved 500 rpm. I'm sure you'll 
get some other ideas too.

Bruce


Bruce W. Schug
President, CORSA South Carolina
Greenville, SC
bwschug at charter.net

CORSA member since 1980

'67 Monza. "67AC140"