how to bypass my VSS?
09-29-2010, 10:44 PM
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Car: 1991 Camaro Z28
Engine: 2002 SS LS1
Transmission: 6 speed
Axle/Gears: Auburn 3.42
how to bypass my VSS?
I did an LS1 swap and my speedo doesnt work. I know the computer is getting and outputting a speed because I have a scan gauge mounted in my car that reads the OBDII port.
I figured I could bypass the chassis wiring and wire the VVS straight to the back of the speedometer. When I did that however the guage worked (immediately going to 140 when I revved it) but I lost the speed coming out of the OBDII port.
I bypassed it by running one of the VVS wires to the signal, not ignition side of the speedometer. Do I need to run a wire from the output of the computer to the back of the speedometer?
I just want my factory gauges to work, thanks for the help!
I figured I could bypass the chassis wiring and wire the VVS straight to the back of the speedometer. When I did that however the guage worked (immediately going to 140 when I revved it) but I lost the speed coming out of the OBDII port.
I bypassed it by running one of the VVS wires to the signal, not ignition side of the speedometer. Do I need to run a wire from the output of the computer to the back of the speedometer?
I just want my factory gauges to work, thanks for the help!
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turbostang8 (04-26-2020)
10-01-2010, 06:14 PM
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Car: 92 Firebird
Engine: Supercharged 6.0
Transmission: T56
Axle/Gears: 8.8 3.73
Re: how to bypass my VSS?
If the car was V6 or TPI, connect the speedo output from the PCM (R50) to C207 pin D (gry)
If the car was TBI, then connect it to C207 pin K (brn) and bypass the buffer box by connected pins C and F
Should work fine now. Be sure your PCM has the proper conversion factor for your rear end gearing and tire diameter
If the car was TBI, then connect it to C207 pin K (brn) and bypass the buffer box by connected pins C and F
Should work fine now. Be sure your PCM has the proper conversion factor for your rear end gearing and tire diameter
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