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On a 2002 Jeep 3.7l. Can some explain why there is two lines going from the lower fuel pump, passing out the upper module into the fuel filter where it goes to one line coming out of the filter? What is the purpose of two lines into the filter? Edit- Found the detail in the service manual...

I ordered the Delphi pump off rockauto and then got a filter as well. As far as I’m aware Delphi is a gm supplier. I didn’t want to go with value brand as it’s my hunting vehicle so break downs can end up being pretty inconvenient. I popped the access panel to do the testing of the fuel pump...

Vehicle doesn’t run right now so can’t test charging volts but I’m gonna put a charger on it anyways as I’m have been draining it pretty good the last few days while diagnosing the fuel pump issue

Thinking about it again though... the battery volts will drop while cranking so I tested cranking volts at battery and pin 30 on relay. They all match at around 10v. All seems normal. I’ll get the new pump in the next few days.

Thanks for your reply. I got a lot of my information for investigating this problem from another thread you commented on in August about voltage drop at the pump. Very informative in regards to how to follow manual. Thank you. I went out this morning under fresh light and a new cup of coffee. I...

Recently purchased an 02’ liberty with the 3.7l v6. Was driving on the road a few days ago, the engine sputtered then died. When cranking it to start it would grab to 200-300rpm for a half second then drop down to zero while still cranking. Never started completely. Got it home, tried to crank...