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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

‘96 Jeep Grand Cherokee, Oil Pressure Problems

Q: The oil pressure gauge falls to zero and the 'Check Gauges' light comes on [along with a beep] every time I let off the accelerator on my ‘96 Jeep Grand Cherokee.  When I accelerate, the gauge goes back to 30-40 psi.  What's the problem and how much is the fix?  

- Ken Halfen

A: The first thing you have to do is a have a mechanical oil pressure gauge installed to confirm that the electronic gauge or sensor is not failing.  I have seen bad oil pressure sensors cause total panic by providing misleading information.  If the mechanical oil pressure gauge confirms that you do have a low oil pressure problem the oil pan will have to be removed to inspect the oil pump and possibly the engine bearings.  A worn oil pump or leaking pick-up tube can cause the problem you’re describing.  A replacement oil pump is not too bad of a job.  If it turns out that the engine bearings are worn you’ll be looking at a rebuilt or replacement engine.

 
     
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