Time for a new fuel pump.

229 Views 10 Replies 4 Participants Last post by CmdrDonnyT., 6 d ago

Hey12

Discussion Starter · 11 d ago

Lately, My fuel pump has been giving me stuttering starts and an inaccurate fuel level on the cluster. I didn't realize the prices were so high. I'm curious if anyone who has replaced a fuel pump has used an aftermarket one. Was it ok to use it rather than OEM, or was it something that was regretted? What was one purchased if it all worked out? Thank you in advance for your responses.

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jklightner

· #2 · 11 d ago

Hey12 said:
Lately, My fuel pump has been giving me stuttering starts and an inaccurate fuel level on the cluster. I didn't realize the prices were so high. I'm curious if anyone who has replaced a fuel pump has used an aftermarket one. Was it ok to use it rather than OEM, or was it something that was regretted? What was one purchased if it all worked out? Thank you in advance for your responses.

Have you checked the pressure on the fuel rail to see if the pump is failing?
When mine was giving me fluctuations at idle and rough starts, problem was intermittent crank position sensor.
As to fuel level indication, had that too. But after a few times of allowing the tank to get low, like 1/8th,, and filling, that stopped. Think I needed to let the float full travel to clean up the signal.
Not saying yours is doing the same, but some more troubleshooting before condemning the pump.
Because it is a p.i.t.a dropping the tank to replace it.
BTW, some model, engine info would be helpful.

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Big Blue

· #3 · 11 d ago

jklightner said:
Have you checked the pressure on the fuel rail to see if the pump is failing?
When mine was giving me fluctuations at idle and rough starts, problem was intermittent crank position sensor.
As to fuel level indication, had that too. But after a few times of allowing the tank to get low, like 1/8th,, and filling, that stopped. Think I needed to let the float full travel to clean up the signal.
Not saying yours is doing the same, but some more troubleshooting before condemning the pump.
Because it is a p.i.t.a dropping the tank to replace it.
BTW, some model, engine info would be helpful.

2008 Commander with the 3.7L V-6 is what's in his signature - if it has the 3.7L V-6 it's most likely a Sport.

EDIT: went into his profile & verified it's a Sport.

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jklightner

· #4 · 11 d ago

Dang, more coffee needed....

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Reactions: 1

Big Blue

· #5 · 11 d ago

jklightner said:
Dang, more coffee needed....

I know that feeling....

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Hey12

Discussion Starter · #6 · 10 d ago

jklightner said:
Have you checked the pressure on the fuel rail to see if the pump is failing?
When mine was giving me fluctuations at idle and rough starts, problem was intermittent crank position sensor.
As to fuel level indication, had that too. But after a few times of allowing the tank to get low, like 1/8th,, and filling, that stopped. Think I needed to let the float full travel to clean up the signal.
Not saying yours is doing the same, but some more troubleshooting before condemning the pump.
Because it is a p.i.t.a dropping the tank to replace it.
BTW, some model, engine info would be helpful.

The problem is intermittent. Sometimes it's OK, while other times it gives me the problem once Ive driven. Everything has been changed out, even the TIPM. With the fuel gauge being inaccurate the whole time Ive had the Jeep, the new fuel pump should fix this problem regardless? The previous owners removed the driver folding seat so I could access the pump from the top. Nonetheless, I would want to do it right the first time. Have you used an aftermarket fuel pump?

Oh, Isn't it in my signature? Im not sure if you all can see it.

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Hey12

Discussion Starter · #7 · 10 d ago

Big Blue said:
2008 Commander with the 3.7L V-6 is what's in his signature - if it has the 3.7L V-6 it's most likely a Sport.

EDIT: went into his profile & verified it's a Sport.

Thank you for this. Have you used an aftermarket fuel pump before? Are they ok?

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jklightner

· #8 · 10 d ago

There is a YouTube where someone accessed through the floor, but that involves cutting metal to get to it, then patching after. Not something I'd be comfortable doing above a fuel tank.
Still running the original fuel pump.
Your signature is fine, just wasn't fully awake at the time.

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Hey12

Discussion Starter · #9 · 10 d ago

jklightner said:
There is a YouTube where someone accessed through the floor, but that involves cutting metal to get to it, then patching after. Not something I'd be comfortable doing above a fuel tank.
Still running the original fuel pump.
Your signature is fine, just wasn't fully awake at the time.

Ahh ok. Mine is already cut out. I await more responses. thanks

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Big Blue

· #10 · 10 d ago

Hey12 said:
Thank you for this. Have you used an aftermarket fuel pump before? Are they ok?

I have not had to do any work to my fuel system, as of yet @Hey12

Sorry I couldn't be more helpful.

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CmdrDonnyT.

· #11 · 6 d ago

I had never swapped a fuel pump out before until last summer.
Bough the most expensive (Delphi) one I could have from Rockauto. Low $200s with shipping. Did the same for my wife’s car and so far so good after nearly 9 months.

Anyhow as far as installation, yes you can cut a hole at the top or you can do it the right way. I preferred the latter. It was nothing out of this world type of job, but it wasnt a walk in the park either.

All you need is about 3-5 hours depending if you got a second hand or not, a few sockets, and some gas disconnecting clamp tools. Add a small jack to lower and raise the fuel tank
I did not bother with cleaning the tank as it had no residue of any type and this is with over 150k miles.

My wifeI had to pay a mobile mechanic $200 and that was simply to access it from the back seat!
I cant imagine how much someone would charge for ours where the tank has to be dropped.

I dont take joy in spending hours underneath my jeep busting old rusted bolts or having my face covered in old dirt but I do take pride in fixing my own stuff and knowing it was done right the first time.
Plus, it strengthens the bond between us two lol

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