Tachometer Slowly Becomes Inaccurate Help Willcox
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Tachometer Slowly Becomes Inaccurate Help Willcox
I recently received a new tach circuit board (from you) for my 1980. It runs fine at first but after some time (5 minutes or so) gradually runs slow the point of losing almost 1/3 of the known rpms. Is this a tach or circuit board problem in your experience? Is there and easy remedy.
Thanks
DFS
Thanks
DFS
Former Vendor
Joined: Aug 2006
Posts: 76,656
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From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
About the only way for me to know is to send in the tach... We are seeing more and more a failure in the analog movement of the tachometers. In the last year we've had three! In the last six years we had only 1....
I can put it on my test machine and tell you for sure.. This service is free less the shipping!
Willcox Inc. C/O Service Dept.
123 E. Maple Street
Jeffersonville, In 47130
I can put it on my test machine and tell you for sure.. This service is free less the shipping!
Willcox Inc. C/O Service Dept.
123 E. Maple Street
Jeffersonville, In 47130
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
Priority Mail flat-rate boxes are good. "If it fits...it ships!" Just pack the thing full of bubble-wrap/peanuts... 
P.S. Your problem could be with the speedo head, the circuit board, OR the tach filter...or any combination of those.
P.S. Your problem could be with the speedo head, the circuit board, OR the tach filter...or any combination of those.
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Before you pull it.. bypass the filter and see if the symptom's continue... 7T1vette is right and I should have suggest this to you first.
I have a testing help page on the web site too.. this may offer you some insight on how to test before sending it in. (I'm a little rusty right now.. just got home from vacation yesterday). It will also show you how to remove the tachometer quickly with little pain.
http://willcoxcorvette.com/repairand...lp.php?hID=290 Just click on supporting document.
How to search our site for Tach help:
I have a testing help page on the web site too.. this may offer you some insight on how to test before sending it in. (I'm a little rusty right now.. just got home from vacation yesterday). It will also show you how to remove the tachometer quickly with little pain.
http://willcoxcorvette.com/repairand...lp.php?hID=290 Just click on supporting document.
How to search our site for Tach help:
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Keep an eye on me..
