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check to see if vehicle speed sensor is bad. it will show up on computer scan that can be done at autozone for free.

2006-09-29 04:50:26
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Q: Why does the speedometer gage jump up at higher speeds but the odometer still is accurate on my 1996 Ford Wind-star Van?
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Related Questions

Will a 2004 Honda Civic EX speedometer work on a Civic DX of the same year?

Yes. It will work without any modifications. However, local laws may prevent you from being able to do this legally. If the odometer is built into the speedometer, the new odometer must read equal to or higher mileage than the odometer you are removing. Not following such laws may result in fraud charges if you decide to sell the car in the future.

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Why does the speedometer on your 1998 cavalier drop after shifts?

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Is it possible to calibrate the speedometer on a 1996 Ford Taurus GL Mine is 6mph higher than it should be?

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An automatically measurement has a higher precision than a manually measurement.

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Your 1999 ford windstar run real rough at an idle but gets better when driving at higher speeds?

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Why does the speedometer on your 1998 cavalier drop a few MPH after some occasional shifts to higher gear IE 3rd to 4th gear speedometer would drop from 35-30-35 without the vehicle speed changing?

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How can you safely add 7300 miles to the odometer of a 99 Harley Davidson XLH1200 motorcycle without driving it the bike needs 7800 miles on it for CA registration it doesn't have CA emissions?

the speed sensor is on the transmission and should have three wires going to it. red is 12+, black is ground and white is the speed signal going to the speedometer. this signal is a 12+ square wave pulse which is counted and converted to miles. one method is to place bike on a block and let it idle in fifth gear but this will take awhile depending on how many miles you need to add. another way is to get a signal generator and hook up to the white wire from the speed sensor with it removed from the connector. adjust the out put for a 12+ pulse if you generator will go that high, if not crank it as high as it will go and hopefull the speedometer will count it. turn on the ignition, engine off, and adjust the square wave output frequency until the speedometer will register, higher mph-the quicker the miles. if it sets a speedometer code, do not worry, it can be erased after you are through.

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A higher sample size gives more accurate results.