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Jim Grant Tech Tips Jim Grant Tech Tips
A collection of helpful articles based on reader submissions
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  Jim Grant's Tech TipsJim Grant's Tech Tips
Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
If you have any questions, please feel free to email us.
 
 

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  Jim Grant's Tech Tips

'99 Jeep Cherokee, Oil Pressure Problems

Q: I have a ‘99 Jeep Cherokee. The oil pressure gauge reads all the way up. When I turn the ignition on the gauge reads normal, then when I turn the motor over the needle shoots all the way up. What do you think the problem is??

A: The oil pressure gauge on your Jeep sends an electrical signal out to a pressure sensor that is on the engine, called an oil pressure sensor. The oil pressure sensor alters the electrical signal from the oil pressure gauge in relationship to oil pressure. The oil pressure sensor lives a hard life with heat, cold and vibration. It is not uncommon for the internal seal of the sensor to fail allowing oil to enter the electrical part of the sensor. The oil really messes things up and causes the oil pressure gauge readings to become erratic and unreliable. In most cases the fix is a replacement pressure sensor.

 
     
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