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Tachometer

Tiny
MIKE KNOPP
  • MEMBER
  • 1991 CHEVROLET CAMARO
Hi there my Tach reads about 5000 rpm at idle, I have checked the wiring as per the factory manual.

All the circuits checkout okay, I have replaced the Tach as recommended by the manual but the new one does the same thing, where do I look next?
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Tuesday, February 13th, 2007 AT 12:53 PM

8 Replies

Tiny
ERVMISTER
  • MEMBER
  • 1 POST
Exchang out your curcuit board as this is usually the problem, I had the same problem and it cured it
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Wednesday, February 14th, 2007 AT 8:24 PM
Tiny
GMPERF
  • MEMBER
  • 2 POSTS
I had the same problem with the tach on my 92 Camaro. Tried the resistor fix but it didnt work. Finally found a tach board at the junkyard that worked for about a year.
I found a new replacement tach board. Only had it for about a week but it seemed to fix the problem! Hurray!!

http://www.wc-autoparts.com/new-1990-92-chevy-camaro-v8-tachometer-circuit-board/
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Tuesday, July 11th, 2017 AT 12:48 PM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,895 POSTS
Great addition to this thread! Please feel free to help out whenever you are on the site :)

Cheers, Ken
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Tuesday, July 11th, 2017 AT 4:40 PM
Tiny
91BLKCAMARO
  • MEMBER
  • 2 POSTS
  • 1991 CHEVROLET CAMARO
I have a 91 camaro V8 RS convertible. The tach maxes out & stays there when the car is running. Any ideas on the fix?
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Tuesday, July 11th, 2017 AT 4:41 PM (Merged)
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
Sounds like a ground problem with the gauge.
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Tuesday, July 11th, 2017 AT 4:41 PM (Merged)
Tiny
91BLKCAMARO
  • MEMBER
  • 2 POSTS
Isn't the whole instrument cluster grounded as a unit. If not any ideas on where the tach is grounded
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Tuesday, July 11th, 2017 AT 4:41 PM (Merged)
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
The gauges are not all grounded together. Here is the location of the ground on the connector for the tach.


https://www.2carpros.com/forum/automotive_pictures/30961_camfig1a_1.jpg

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Tuesday, July 11th, 2017 AT 4:41 PM (Merged)

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