Question about 2003 Chevrolet Silverado 1500

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Speedometer reading fluctuates

I have a 1992 Chevrolet K2500 4 Wheel Drive. I recently had a new motor installed. The speedometer started to fluctuate about 3 days after getting it back. At 45 mph it will peg out at 80 mph and return to speed. However at 65 mph it will peg at 80 mph and either stay or return a few seconds to 70 mph and then up to 80 mph. I am not getting a engine light. While removing the motor, the cable going from the TBI to the Cruise control was broken and it is currently disconnected from the TBI. I noticed that if I hit the resume speed or set on the cruise control handle, the needle fluctutation coincides with that. Should I pull the fuse on the cruise control? Any suggestions.

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IMHO, I think that the broken cable is what is causing the problems. It "confuses" the programing of the CPU or computer.

Posted on Dec 17, 2008

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