1990 tachometer question
Thread Starter
Intermediate
Joined: Jun 2007
Posts: 44
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1990 tachometer question
I have a1990 6 spd and my tach has quit functioning. The rpoblem probably is the tach filter needs to be replaced. My question is where is it located? Wha tdoes it look like. I have identified what I belive to be the tach lead coming of the distributor on the left side. It goes down behind the left cylinder and the firewall. What am I looking for and what does it look like. Where it it located? Be specific. thanks
Melting Slicks
Joined: Mar 1999
Posts: 2,830
Likes: 20
From: Las Vegas Nevada
Tach filter should be mounted to the rear left cylinder head. It's a small barrel shaped device about 1.5" long and about as round as a dime. It should have a tan lead leading to and from it. Below is a picture:
They have been discontinued from GM for some time now. Aside from buying a used one this guy makes new ones:
http://www.rodneydickman.com/CorvetteTachFilter.html
I E-mailed him about a tach filter for my '90 and he said the one listed on his site should be fine for all 'vettes up to '91. He is not a Corvette guru and was not sure of the year range for the L98. That is why his application chart only goes to '89.
They have been discontinued from GM for some time now. Aside from buying a used one this guy makes new ones:
http://www.rodneydickman.com/CorvetteTachFilter.html
I E-mailed him about a tach filter for my '90 and he said the one listed on his site should be fine for all 'vettes up to '91. He is not a Corvette guru and was not sure of the year range for the L98. That is why his application chart only goes to '89.
Last edited by VtVette; Sep 16, 2007 at 08:30 PM.
Thread Starter
Intermediate
Joined: Jun 2007
Posts: 44
Likes: 0
1990 tachometer question
I found the tach filter by tracing the lead wire from the distributor. Problem is I cannot acces it from above. Is it accessable from below, or do as it appears have to remove the distributor to gain access?
Team Owner
Joined: Jul 2004
Posts: 28,472
Likes: 3,290
From: Hartford WI
I seem to have an issue with my tach. I am going to try the tach filer. Problem is I went with an HSR so I don't have the same setup. In any case, I found a couple of wires that go from my distributor. One is pink and the other is white. It goes to my remote coil. Well, that white from the coil leads to a rectangular box. One white going in, one white going out and a black. Sounds like a tach filter to me. However, it is rectangular and not round like others are saying. Is that it?
This is for a 91
This is for a 91
Last edited by aklim; Nov 10, 2007 at 04:57 PM.
