Fuel pump

How long should a fuel pump last? I put a new one in about six years ago when the jeep started cutting out on me at inopportune times. I have had no problems since then.

Today it stopped on me twice. I had to let it sit about 10 minutes and then it would crank up. It would spit and sputter some and I hand to keep the RPMs high to keep it running. Very similar to what it was doing six years ago when I installed the new pump.

 

Lots of variables like quality of pump, how much it sits (hard on the diaphragm) and type of fuel used. Newer high alcohol content fuels are hard on older fuel systems....


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All mine seem to last about forever.

 

I'm not sure why a fuel pump would work better after sitting for 10 minutes?

 

"I'm not sure why a fuel pump would work better after sitting for 10 minutes?"


...some kind of heat related vapor-lock?

 

Well, it was a little over 100 degrees and a lot of heat in the engine bay. I though some type of vapor related issue, but... It will run 10-15 minutes and then start to spit and sputter and then die. After it sits for a few minutes, it'll crank up and run well for a few more.

 

Sounds like the fuel pump is putting out some pressure and volume but not enough to keep up with the engine under load.


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Reminiscent of a fuel fill cap not venting properly.

 

Sure. I don't usually think the 100 degree thing.

 

"Reminiscent of a fuel fill cap not venting properly."

I agree. Easy to check, just loosen the cap. But the only time this happened to me, the vacuum actually collapsed the fuel tank.

 

Or having some kind of floating crap like maybe wasp nesting in there that will plug the pickup and cause that.

 

That's a though I will have to check. May need a new fuel line.