carlos64030

iTrader: (1)

I have a 1991 Trans Am GTA and I'm having random speedometer issues where it'll just stop working. I've already changed the Vehicle Speed Sensor and that didn't solve the issue. I already know it's not an instrument cluster issue because when the speedometer stops working, so does the cruise control. What else should I check? A possible short in the VSS wire?

When I say random problems, it's like REALLY random. For example: one day the speedometer wouldn't work at all and then not a single issue the next day. Today, it started off not working and then it did later then stopped again.

blacksunshine'91

iTrader: (10)

When you replaced the VSS, did you inspect the gear on the output shaft to see if the teeth on it were still good?

topduarte

iTrader: (8)

It is probably the electronic resistor leaking in the electronic circuit board that controls.

This happened in my 92 z28

Tuned Performance

iTrader: (92)

I hate when resistors take a leak on circuit boards.

carlos64030

iTrader: (1)

The transmission was fully rebuilt a few weeks ago. I ASSUME all of that was taken care of.

carlos64030

iTrader: (1)

Where would that resistor be located?

Tuned Performance

iTrader: (92)

Is the check engine light coming on and ecm storing a code 24 ?
tpi ?

carlos64030

iTrader: (1)

The Check Engine Light has been rendered obsolete because my car's power train is managed with the Holley HP EFI ECU. For the record, I was having this speedometer issue when my car was bone stock.

Tuned Performance

iTrader: (92)

Does the Holley get a Vss signal you can watch or datalog ?
do you have a Vss buffer ? Cable drive speedometer ? Dakota digital sgi5 or 100bt ?