79 tach problem

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Mar 29, 2007 | 02:17 AM

ericlamb

Thread Starter

Newbie

Joined: Oct 2006

Posts: 7

From: Houston

79 tach problem

having a tach issue on a 79 z28. when key is set to run position tach moves up to 1 to 1.5k. when started needle comes all the way around to point directly down. whats the solution or possible faulty part.
thanks for any advice

Mar 29, 2007 | 02:20 AM

thebandit110

2nd Gear member

Joined: Jan 2007

Posts: 403

RE: 79 tach problem

well your tach goes back to your distributer if it is stock. is it a factory of aftermarket??? if it is stock go to your distributer and check all connections and grounds and what not.

Mar 29, 2007 | 11:18 AM

ericlamb

Thread Starter

Newbie

Joined: Oct 2006

Posts: 7

From: Houston

RE: 79 tach problem

yeah its stock and everything apears to be hooked up.

Apr 2, 2007 | 02:22 AM

camarocubpilot8

In the Staging Lanes

Joined: Jan 2007

Posts: 36

From:

RE: 79 tach problem

Common Problem. Probably either the tach itself or the printed circuit board.

Apr 2, 2007 | 02:51 AM

Jimbro727

Newbie

Joined: Feb 2007

Posts: 18

From:

RE: 79 tach problem

Quote:

ORIGINAL: ericlamb

having a tach issue on a 79 z28. when key is set to run position tach moves up to 1 to 1.5k. when started needle comes all the way around to point directly down. whats the solution or possible faulty part.
thanks for any advice

Mine has the same problem! I have an MSD box which I know nothing about, does that change anything? Should we just replace the tach or is there any fixing it?

Sorry for the slight hijack!

--Jimmy