97 cherokee 4L - Fuel pump #5 in 250k
 

Purchased vehicle new, have been meticulous w/maintenance. I am about to
take on fuel pump #5. Anyone else getting only 50k / fuel pump? Averages
out to a new pump every 2 years.

Mechanic says pressure is all over the map.

First one was under warranty, after the fuel sending gauge issue... the rest
have been customer pay warranty.

Re: 97 cherokee 4L - Fuel pump #5 in 250k
 

Do you regularly run your tank low? The fuel pump is cooled by fuel in the
tank.
Constantly running the tank low creates some heat in the pump, shortening
it's lifespan over time.

Spdloader


"MJG" <jodimark@removethis1.bellsouth.net> wrote in message
news:%uR6h.244$PS2.138@bignews8.bellsouth.net...
> Purchased vehicle new, have been meticulous w/maintenance. I am about to
> take on fuel pump #5. Anyone else getting only 50k / fuel pump? Averages
> out to a new pump every 2 years.
>
> Mechanic says pressure is all over the map.
>
> First one was under warranty, after the fuel sending gauge issue... the
> rest have been customer pay warranty.
>

Re: 97 cherokee 4L - Fuel pump #5 in 250k
 

Do you regularly run your tank low? The fuel pump is cooled by fuel in the
tank.
Constantly running the tank low creates some heat in the pump, shortening
it's lifespan over time.

Spdloader


"MJG" <jodimark@removethis1.bellsouth.net> wrote in message
news:%uR6h.244$PS2.138@bignews8.bellsouth.net...
> Purchased vehicle new, have been meticulous w/maintenance. I am about to
> take on fuel pump #5. Anyone else getting only 50k / fuel pump? Averages
> out to a new pump every 2 years.
>
> Mechanic says pressure is all over the map.
>
> First one was under warranty, after the fuel sending gauge issue... the
> rest have been customer pay warranty.
>

Re: 97 cherokee 4L - Fuel pump #5 in 250k
 

Do you regularly run your tank low? The fuel pump is cooled by fuel in the
tank.
Constantly running the tank low creates some heat in the pump, shortening
it's lifespan over time.

Spdloader


"MJG" <jodimark@removethis1.bellsouth.net> wrote in message
news:%uR6h.244$PS2.138@bignews8.bellsouth.net...
> Purchased vehicle new, have been meticulous w/maintenance. I am about to
> take on fuel pump #5. Anyone else getting only 50k / fuel pump? Averages
> out to a new pump every 2 years.
>
> Mechanic says pressure is all over the map.
>
> First one was under warranty, after the fuel sending gauge issue... the
> rest have been customer pay warranty.
>

Re: 97 cherokee 4L - Fuel pump #5 in 250k
 

Say what????

Once you are below 3/4 of a tank the fuel pump is sitting in the air.
It has a pickup tube to reach into the gas.

The cooling jacket around the pump is fed by the fuel return line that
comes back from the engine.

The only way to burn out a pump from heat is to block the fuel return
line.

I would suspect the OP has a bad regulator, not a bad pump.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Spdloader wrote:
>
> Do you regularly run your tank low? The fuel pump is cooled by fuel in the
> tank.
> Constantly running the tank low creates some heat in the pump, shortening
> it's lifespan over time.
>
> Spdloader
>
> "MJG" <jodimark@removethis1.bellsouth.net> wrote in message
> news:%uR6h.244$PS2.138@bignews8.bellsouth.net...
> > Purchased vehicle new, have been meticulous w/maintenance. I am about to
> > take on fuel pump #5. Anyone else getting only 50k / fuel pump? Averages
> > out to a new pump every 2 years.
> >
> > Mechanic says pressure is all over the map.
> >
> > First one was under warranty, after the fuel sending gauge issue... the
> > rest have been customer pay warranty.
> >

Re: 97 cherokee 4L - Fuel pump #5 in 250k
 

Say what????

Once you are below 3/4 of a tank the fuel pump is sitting in the air.
It has a pickup tube to reach into the gas.

The cooling jacket around the pump is fed by the fuel return line that
comes back from the engine.

The only way to burn out a pump from heat is to block the fuel return
line.

I would suspect the OP has a bad regulator, not a bad pump.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Spdloader wrote:
>
> Do you regularly run your tank low? The fuel pump is cooled by fuel in the
> tank.
> Constantly running the tank low creates some heat in the pump, shortening
> it's lifespan over time.
>
> Spdloader
>
> "MJG" <jodimark@removethis1.bellsouth.net> wrote in message
> news:%uR6h.244$PS2.138@bignews8.bellsouth.net...
> > Purchased vehicle new, have been meticulous w/maintenance. I am about to
> > take on fuel pump #5. Anyone else getting only 50k / fuel pump? Averages
> > out to a new pump every 2 years.
> >
> > Mechanic says pressure is all over the map.
> >
> > First one was under warranty, after the fuel sending gauge issue... the
> > rest have been customer pay warranty.
> >

Re: 97 cherokee 4L - Fuel pump #5 in 250k
 

Say what????

Once you are below 3/4 of a tank the fuel pump is sitting in the air.
It has a pickup tube to reach into the gas.

The cooling jacket around the pump is fed by the fuel return line that
comes back from the engine.

The only way to burn out a pump from heat is to block the fuel return
line.

I would suspect the OP has a bad regulator, not a bad pump.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
(More Off Road album links at bottom of the view page)

Spdloader wrote:
>
> Do you regularly run your tank low? The fuel pump is cooled by fuel in the
> tank.
> Constantly running the tank low creates some heat in the pump, shortening
> it's lifespan over time.
>
> Spdloader
>
> "MJG" <jodimark@removethis1.bellsouth.net> wrote in message
> news:%uR6h.244$PS2.138@bignews8.bellsouth.net...
> > Purchased vehicle new, have been meticulous w/maintenance. I am about to
> > take on fuel pump #5. Anyone else getting only 50k / fuel pump? Averages
> > out to a new pump every 2 years.
> >
> > Mechanic says pressure is all over the map.
> >
> > First one was under warranty, after the fuel sending gauge issue... the
> > rest have been customer pay warranty.
> >

Re: 97 cherokee 4L - Fuel pump #5 in 250k
 

MJG wrote:
> Purchased vehicle new, have been meticulous w/maintenance. I am
> about to take on fuel pump #5. Anyone else getting only 50k / fuel
> pump? Averages out to a new pump every 2 years.
>
> Mechanic says pressure is all over the map.
>
> First one was under warranty, after the fuel sending gauge issue...
> the rest have been customer pay warranty.

Either the pump works or it doesn't.
I'd suspect an electrical problem/bad connector
or even the pressure regulator/filter before the
pump. You don't happen to be running E85 or an ethanol
blend? That stuff will eat the seals.


--
-- DougW -- 93 ZJ 4.0 http://revbeergoggles.com
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!

Re: 97 cherokee 4L - Fuel pump #5 in 250k
 

MJG wrote:
> Purchased vehicle new, have been meticulous w/maintenance. I am
> about to take on fuel pump #5. Anyone else getting only 50k / fuel
> pump? Averages out to a new pump every 2 years.
>
> Mechanic says pressure is all over the map.
>
> First one was under warranty, after the fuel sending gauge issue...
> the rest have been customer pay warranty.

Either the pump works or it doesn't.
I'd suspect an electrical problem/bad connector
or even the pressure regulator/filter before the
pump. You don't happen to be running E85 or an ethanol
blend? That stuff will eat the seals.


--
-- DougW -- 93 ZJ 4.0 http://revbeergoggles.com
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!

Re: 97 cherokee 4L - Fuel pump #5 in 250k
 

MJG wrote:
> Purchased vehicle new, have been meticulous w/maintenance. I am
> about to take on fuel pump #5. Anyone else getting only 50k / fuel
> pump? Averages out to a new pump every 2 years.
>
> Mechanic says pressure is all over the map.
>
> First one was under warranty, after the fuel sending gauge issue...
> the rest have been customer pay warranty.

Either the pump works or it doesn't.
I'd suspect an electrical problem/bad connector
or even the pressure regulator/filter before the
pump. You don't happen to be running E85 or an ethanol
blend? That stuff will eat the seals.


--
-- DougW -- 93 ZJ 4.0 http://revbeergoggles.com
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!