91 erratic tach
Thread Starter
Drifting
Joined: Sep 2009
Posts: 1,768
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From: Willis, tx
91 erratic tach
My 91 tach shows 4,000 rpm at idle and pegs out above an idle. Occasionally the tach doesn't work at all then suddenly pegs out. I suspect a ground issue, where do I start looking. From the 60's through the 80's I drove C2 Corvettes but I havn't owned one since 1983. I really like this C4 6 speed convertible.
Safety Car
Joined: Jan 2004
Posts: 3,783
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From: Northern California
Replace the "Tach Filter" White wire located on the driver side of the distributor. http://forums.corvetteforum.com/1562973606-post1.html
Last edited by GKK; Sep 3, 2009 at 11:01 AM.
Pro
Joined: Mar 2008
Posts: 579
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From: High Bridge New Jersey
It's
My 91 tach shows 4,000 rpm at idle and pegs out above an idle. Occasionally the tach doesn't work at all then suddenly pegs out. I suspect a ground issue, where do I start looking. From the 60's through the 80's I drove C2 Corvettes but I havn't owned one since 1983. I really like this C4 6 speed convertible.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
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From: WV
According to 3 different parts sites I went to the tach filter only went into cars up to 89, then theres no listing for them, see below...WW
http://www.ecklers.com/product.asp?p...7&dept_id=1135
http://www.ecklers.com/product.asp?p...7&dept_id=1135
Safety Car
Joined: Mar 2005
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From: Winnipeg Manitoba, Canada
I replaced the one in my '90 with a 92' cluster and removed the filter. The tach is pretty bang on now.
Pro
Joined: Mar 2008
Posts: 579
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From: High Bridge New Jersey
They
According to 3 different parts sites I went to the tach filter only went into cars up to 89, then theres no listing for them, see below...WW
http://www.ecklers.com/product.asp?p...7&dept_id=1135
http://www.ecklers.com/product.asp?p...7&dept_id=1135
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Pro
Joined: Mar 2008
Posts: 579
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From: High Bridge New Jersey
For
Also I think you need to swap out the center section (speedo/odo) since the positions are reversed from (I think) 94 through 96, compared to earlier.
