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Discussion Starter · #1 ·
I have a frustrating problem on my SS454. The original factory tach is reading RPM speed twice the expected amount. Any suggestions or should I just replace the tach with another one I have on hand? I was thinking maybe it was a simple wire connection problem or perhaps a bad circuit board on the back of the dash cluster?


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1970 SS 454 Hardtop
1970 SS 396 El Camino
1970 SS 396 Hardtop
1986 SS Choo Choo Elky
TC Gold #155
 

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chuck...you might check with the clock doc at 1-800-256-5362. they restore clocks or will convert to quartz. they also restore tachs. i highly recommend them.

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hairy
66ss396 marina blue A.C.E.S #124
walt's 66 SS.COM
 

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What ignition system are you using, original points or HEI or ?. Sometimes the factory tach won't work right with aftermarket ignitions.

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Steve Strasemeier (70SS 396, Fathom Blue/White Stripes)
My 70SS
 

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you may need to do the HEI mod on your tach, or could possibly have problems with a ground. Doy LeCroy is just outside of Mesquite and specializes in tach repairs, email me if you need a phone number
 

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I'm in Garland TX, and I also repair tach's.

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Steve Strasemeier (70SS 396, Fathom Blue/White Stripes)
My 70SS

[This message has been edited by Steve S (edited 02-21-2001).]
 

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Discussion Starter · #6 ·
Thanks for the input guys. I am running stock points and condenser. I think I will try one of the other factory tachs I have and see if one of them works correctly and if not, I know I have a wiring problem. If one of the other tachs works OK then I will get the one in the car repaired as a back up.

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1970 SS 454 Hardtop
1970 SS 396 El Camino
1970 SS 396 Hardtop
1986 SS Choo Choo Elky
TC Gold #155
 
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