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Old 10-25-2017, 10:52 AM   #1
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Join Date: Dec 2005
Location: maple Grove, Minnesota
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2008 Grand Caravan SXT - Help with fuel pressure test results?

I have 2008 Grand Caravan SXT with 3.8 liter engine. Starting this summer an intermittent long crank time presented itself and now a misfire is being reported on cylinder 1. Long crank time mostly happens in the morning and misfire goes away after driving a few seconds and run fine. If the temp is 20 degrees or lower the misfire does happen as often.

I have check the fuel pump relay and that tested good.

I have finally did a fuel pressure test. I connected the pressure gauge before the fuel rail.

Initial pressure 55 and 59 (ran pressure test twice)
Leak down: in 5 minutes pressure drop to 30 and 32
in 15 minutes pressure drop to 10 and 12
pressure was still dropping after 15 minutes, I just stopped the test.

Does the pressure test indicate a bad return valve on pump or something else?

Thank you for your help.

Last edited by scherp; 11-11-2017 at 11:24 AM. Reason: Fuel pressure test was done
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