Question about 2000 Jeep Grand Cherokee

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My fuel gauge drops to E when I start it, stop or leave it running in one place for any length of time, and then eventually goes back to where it is supposed to be.

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  • jonben99 Feb 08, 2009

    I have the same problem and need to know what to do (I have a 97 Jeep Grand Cherokee). Is it the fuel pump that's the problem?

  • cbnumba96 Feb 12, 2009

    same happens to my '96. I dont know why but i never know when i have enough gas now.



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It is the sending unit the float probably has a hole in it or the unit itself is going bad.

Posted on Mar 14, 2009


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Hi. It would be useful to get a code read and some live data from a decent diagnostic tool. There are quite a few possible causes including, pressure in tank - if the fuel tank can't vent pressure then a vacuum will eventually form stopping fuel getting to the engine, this will cause it to loose power and stall. Then after a few mins the pressure will drop and the process start again, easy test is when the car stalls remove filler cap - if that's the fault there will be an audible hiss and the car will start up again.

part blocked exhaust will have same problems but will more generally cause a lack of power and acceleration.
are there other symptoms? i.e only when conering or only when pulling off or stopping, engine light on/off. Jon

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It sounds like your loosing your fuel pressure prim. There is a check valve at the fuel pump and when it goes bad, the fuel pump unit needs to be replaced and that will also address your gas gauge issues. If yo go to Auto Zone you can buy a replacement fuel pump and they will have the step by step instructions for you to replace the fuel pump. I'll give you a hint, remove the Bed from the rails since there is only about 8 bolts holding it down. This is easier then dropping the gas tank to get to the fuel pump in the tank. Also lone out a fuel pressure gauge and check the fuel pressure at the Shredder valve and do a pressure drop, once you have the proper fuel pressure 60 to 65psi, see how long it will take for the fuel system to drop. If it drops quick, time to replace the fuel pump and replace the fuel filter too since your doing all this work. Good luck friend. Keep me posted if you have any other questions. 

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