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Old 09-06-2019, 10:01 PM
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06 lj stalls after new fuel pump

Well had a dead fuel pump so I got a new one. Changed it started and ran fine. Only for a day then I left for month and a week. Came back went for a ride and was good for about 30 min and just died. Started back up fine. About 15 min later died and I start. Got it home and started with starting fluid. But was starving and it died. So my guess is either a fuel filter is clogged, maybe a bad pump. Maybe injectors but I don’t think so. Had a half a tank when it sat so I don’t think the gas is bad? Gonna get a pressure gauge and see what it reads tomorrow. Don’t wanna drop the rank if it’s not needed. Anything I should look for besides what I said ? Has 144k got it at 90k. Never replaced fuel filter either in it. Think I can take one side of the filter off and see if it pumps gas? In a bucket of course ? Thanks.

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Old 09-07-2019, 01:53 AM   #2
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Your fuel filter is very likely (!) not clogged. What brand of fuel pump did you install?

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Old 09-08-2019, 01:10 AM
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To be honest I had a shop do it. I traded screen work for the owner so I’m not to sure where he gets the parts from. So it’s under warranty but if I can fix it easy at home instead of bringing it back. Cause I would have to tow it there. It could be a bad pump. Old Jeep had a bad one after I installed it . And that was from advance
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Old 09-08-2019, 09:55 AM   #4
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Still sounds like a bad pump


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Old 09-08-2019, 10:55 AM
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Is there a way to test it without dropping the tank? It won’t start now only with starting fluid.
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Old 09-08-2019, 12:35 PM   #6
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If it only starts with starting fluid it is fuel starved
So either rail pressure is low or injectors are not firing

Listen for injector clicks or try noid lights

If injectors are clicking or noid lights are flashing with cranking leaves fuel rail

If you have a pressure port on rail easy to check otherwise need an adapter hose with port or left assuming that with injector pulse and fuel starvation and gas tank not empty then pump is probably the problem


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Old 09-08-2019, 01:19 PM   #7
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Is there a way to test it without dropping the tank? It won’t start now only with starting fluid.
You can rent a fuel pressure gauge for free at AutoZone etc. You should be around 48-50psi.
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Old 09-08-2019, 02:29 PM
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Is that at idle? It won’t start or stay running. It’s my daughter’s birthday today so I won’t have time to mess with it until tomorrow
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Old 09-08-2019, 05:05 PM   #9
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Is that at idle? It won’t start or stay running. It’s my daughter’s birthday today so I won’t have time to mess with it until tomorrow
At or close to 49 psi at all times the engine is running.
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Old 09-08-2019, 05:25 PM   #10
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You can rent a fuel pressure gauge for free at AutoZone etc. You should be around 48-50psi.
Exactly. I bet the fuel pump is bad.
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Old 09-08-2019, 06:36 PM   #11
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Is that at idle? It won’t start or stay running. It’s my daughter’s birthday today so I won’t have time to mess with it until tomorrow
Doesn't need to be running to test: it may register lower though engine off, key on.

https://troubleshootmyvehicle.com/je...l-pump-tests-2
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Old 09-08-2019, 07:10 PM   #12
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Doesn't need to be running to test: it may register lower though engine off, key on.
To be a valid test of the pump the engine needs to be running and revved up during the test to insure the pump can keep the pressure up. It's much easier to maintain 49 psi without a load on it.
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Old 09-09-2019, 12:09 AM
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Well if I cant get it running what does it need to read? I’m gonna call the shop in the morning. I shouldn’t have to mess with it at all. If a shop did it. The shop should of made sure it was fixed completely before returning it to a customer. Regardless of we traded work for work. His screens aren’t ripped after I replaced them lol.
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Old 09-12-2019, 01:16 AM
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Ended up being a loose wire in/on fuel pump. Mechanic came and picked Up Jeep from my house. And moved the harness and the pump shut off. Fixed it with in hours. And is great now. Must of pinched it or something during installing it. He handled it in a professional manner and I’m pleased.
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Old 09-12-2019, 02:13 PM   #15
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That's good news!

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