speedometer

[stratosjohn]

A while back I asked a question concerning the speedometer in my 1987 Vette.(4+3 Transmission) It would bounce between say 0 and 35, 15-55 etc. Most of the replys I got stated they felt it was the speed sensor located on the transmission rather than a problem with the digital dash. Been rebuilding another car and really never got around to repairing the speedometer. Took the car out the other day, now the tach shows 0 rpms (was working fine before) and the speedometer reads very high numbers. Need an option, do you think its still the sensor or did the digital dash go? Thanks for any help or opinions on this.
John

 

[Jeb]

It's possible that the dash has gone south but look at the upside. You're getting great mileage now.

Seriously, if it's the processor, that's one of the more inexpensive (?) fixes with the dash but I think it'll probably turn out to be a ground problem.

 

[stratosjohn]

Definetly looks like I'm getting great mileage. The estimated guage shows high numbers, running 95 mph and turning 0 rpm's. Thanks for the input, hopefully it's a ground issue and hopefully I can find the problem.

 

[Jeb]

Here's a link to a troubleshooting guide..

http://www.corvettemagazine.com/1999/dec99/dash/dashp1.asp

Good luck.

 

[WhalePirot]

and more....
http://www.batee.com/corvette/dcrg/