@001 Jeep GCL stalling problem

Asked by Edward Dec 01, 2018 at 10:27 AM about the 2001 Jeep Grand Cherokee Laredo 4WD

Question type: Maintenance & Repair

Hi, I have a 2001 Grand Cherokee Laredo and a problem I haven't figured out
yet.
The GCL is an 6 cyl auto, the problem is stalling, it will drive for a 10-20
minutes then stall, wait 20 minutes and it will start again the drive for 10-20
minutes.
I have noticed that when idling in the driveway that the fuel pump hums,
sometimes pretty loud, so I'm thinking its the fuel pump.
It's not showing any codes either.
Is there any way to diagnose the problem before I go and change the pump or
does it sound like the pump is the problem?

Thanks for any help.

1 Answer
42,870

Hornet_2497 answered 5 years ago

Before replacing the fuel pump, do a pressure test at the Schrader valve on the fuel rail, looking for a steady 55psi , more or less. Then check/replace fuel filter and retest pressure for any change or improvement. Note that the fuel filter also contains your fuel pressure regulator. Also, fuel problems don't always show a code. At first I was going to say problem was crankshaft position sensor.....P0320. Common problem with this engine. Cuts in and out until you are walking. Good Luck.

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