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Replacing fuel pump

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Old 07-29-2010, 07:26 PM
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Originally Posted by NewXJaddict
Cranks just fine but wont turn over.
Cranks= turns over. Turns over doesn't mean start.

Try spraying some starting fluid or putting some gas in the throttle body.
Old 07-29-2010, 07:28 PM
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Originally Posted by NewXJaddict
The gauge reads 1/4 tank. I know that can often be wrong but fuel in the line and at the rail makes me think there is fuel. Even with just enough fuel to fill the lines it should at least start for a second right?
No The injectors need pressure.
Old 07-29-2010, 07:31 PM
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ok... can you insert a hose into the gas fill nozzle and reach the bottom of the tank or does something block it?


I already cut a piece of hose and cleaned it off. Just making sure it can reach the bottom of the tank.


If I need gas.....I am going to be SO ashamed of myself.
Old 07-29-2010, 07:33 PM
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I don't think you can.
Old 07-29-2010, 07:37 PM
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ok well. I am off to get a gas can and some gas. Can't hurt to try adding I guess.
Old 07-29-2010, 07:42 PM
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dont add too much incase you need to pull the pump back out!
Old 07-29-2010, 07:48 PM
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Yeah I got a 5 gal can. Ill start with half of that and see what happens.
Old 07-29-2010, 08:15 PM
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Well....no luck with that idea. Dark, raining and lightning out. I guess Ill call it a night for now.

Battery is starting to go dead on top of everything else.


Old 07-29-2010, 08:17 PM
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Old Murphy's law strikes again.
Do you have a battery charger? If so, put it on a trickle charge overnight.

Last edited by ol"blue; 07-29-2010 at 08:19 PM.
Old 07-29-2010, 08:21 PM
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Originally Posted by ol"blue
Old Murphy's law strikes again.
Do you have a battery charger?

Sure don't.

Out of ideas
Out of money
Out of patience
and out of time.

Old 07-29-2010, 08:25 PM
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Murphy's law...
Old 07-29-2010, 08:34 PM
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ok.... lets say NAPA gave me the wrong one.... Maybe I got the pump for TBI instead of MPI.

Would it still start but just run bad?

The hoses are 2 different sizes so ya can't mix em up.

the arrow on the fuel filter points towards the engine right? (the old one didnt have an arrow)
Old 07-29-2010, 08:35 PM
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You bought it from CRAPA..........jk


I have gotten a few "new" bad pumps before.

Last edited by Willys55; 07-29-2010 at 08:41 PM.
Old 07-29-2010, 08:50 PM
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Is there any way to tell if the pump is bad? Kinda hard to tell what the problem is....I could be looking in completely the wrong area. I KNOW I don't hear it hum when starting the jeep like the old one did before I broke down.

The only difference between the old pump and the new one that I noticed was a single black (assuming ground) wire.

The old one had it attached to the outside of the pump where the 2 nozzles come out. the new one had it on the back side of the pump. Still the disc part that the hoses run through.

The connectors are the same and hook right up. 3 wires coming out of the pump and 3 wires on the connector.

Last edited by NewXJaddict; 07-29-2010 at 08:57 PM.
Old 07-29-2010, 09:12 PM
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I guess the good news here is that now I know how it goes in and how it comes out. Second time around shouldn't be quite as difficult.

also. If I take the new pump back to NAPA and get a replacement is there a way to test the replacement before going through the trouble of putting it in the tank?


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