Speedo quits working sometimes
Thread Starter
Joined: Oct 2005
Posts: 652
Likes: 0
From: Crestview, Florida
Car: 86 IROC-Z
Engine: 370 LQ9
Transmission: T56 Magnum
Axle/Gears: 3.73
Speedo quits working sometimes
Car is a 92z with a L98 and 700R4. The speedometer will sometimes stop working and the car starts running like crap. It'll come back and go out aswell. It doesn't happen all the time, so Im wondering what it could be.
Only code was a 33, so i'll be looking at the MAP sensor tomorrow but im pretty sure thats unrelated.
Only code was a 33, so i'll be looking at the MAP sensor tomorrow but im pretty sure thats unrelated.
Joined: Apr 2005
Posts: 7,736
Likes: 14
From: Not in Kansas anymore
Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Speedo quits working sometimes
If you don't have a code 24 VSS error code
http://www.chevythunder.com/vss_code_24_sd_199092.htm
then your problem is likely the speedo or the wiring to it from the ECM.
In your car ,the VSS input goes to the ECM 1st , then the speedo signal is outputted to the cluster
http://www.chevythunder.com/vss_code_24_sd_199092.htm
then your problem is likely the speedo or the wiring to it from the ECM.
In your car ,the VSS input goes to the ECM 1st , then the speedo signal is outputted to the cluster
Junior Member
Joined: Nov 2013
Posts: 43
Likes: 0
From: Yokota US Air Base, Tokyo Japan
Car: 1991 Z28 Convertible
Engine: 305 TPI
Transmission: Auto 4L60
Re: Speedo quits working sometimes
Great info here:
https://www.thirdgen.org/forums/elec...ml#post5725338
https://www.thirdgen.org/forums/elec...ml#post5725338
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