
1992 Pontiac Grand Prix LE 3.1L Speedometer
Speedo reads approx 1/2 of actual speed. At 60 mph speedo reads about 30 mph, if you go faster speedo burys itself. I have changed vss, no help. Scan data reads same as speedo. I have changed ecm and tried 2 different proms, no change. Tire size is 1 size larg...
FIX posted 6/27/2005
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Message Closed w/FIX
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VIN | 1G2WH54T4N |
Engine | 3.1 L / 6 cyl / GAS |
Trans | 3-speed Automatic |
Delivery | FI / sefi |
Emissions | us fed |
Symptoms | Speedometer |
Occurs | Always |
Message Closed w/FIX
Vehicle Data
1992 Pontiac Grand Prix LE
VIN | 1G2WH54T4N |
Engine | 3.1 L / 6 cyl / GAS |
Trans | 3-speed Automatic |
Delivery | FI / sefi |
Emissions | us fed |
Symptoms | Speedometer |
Occurs | Always |