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Speedometer and Tach Issues

 
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Old 10-11-2009, 11:09 PM
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Icon5 Speedometer and Tach Issues

Several months ago my speedometer on my 94 SI (Not Vtech) began to register about 20 miles faster than I was actually going. I confirmed this with a GPS. If I am sitting at idle my speedometer shows I am running at about 20MPH.

Now my Tach is going funny following the replacement of my water pump and timing belt system. At idle it shows that I am turning about 100 RPM or less. It idles smoothly so I don't trust it. I did replace the PCV valve.

Suggestions please.

DaD
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Old 10-12-2009, 01:11 AM
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Re: Speedometer and Tach Issues

VSS-vehicle speed sensor. check it. and the wires going to the computer
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