| Fuel pump runs continuously- 92 Jeep Cherokee [message #777352] |
Sun, 16 July 2006 21:21 |
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Anyone know what would cause my fuel pump to run what seems like, from
the sound, continuously wide open? When I start the jeep I can normally
hear it for a second or 2 while it comes up to pressure then it runs
quietly. When it is acting up I hear the loud noise continuously. The
last time it quit working completely. I have replaced my fuel pump 3
times and each one has done the same thing. I have also replaced the
fuel filter and relay. I have not replaced the pressure regulator.
Could this be causing the problem? I have a 92 Jeep Cherokee L6 4.0L
4WD. Any help would be appreciated.
Thanks
Rick
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| Re: Fuel pump runs continuously- 92 Jeep Cherokee [message #777354 ] |
Sun, 16 July 2006 22:20 |
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Rick wrote:
> Anyone know what would cause my fuel pump to run what seems like, from
> the sound, continuously wide open? When I start the jeep I can
> normally hear it for a second or 2 while it comes up to pressure then
> it runs quietly. When it is acting up I hear the loud noise
> continuously. The last time it quit working completely. I have
> replaced my fuel pump 3 times and each one has done the same thing.
> I have also replaced the fuel filter and relay. I have not replaced
> the pressure regulator. Could this be causing the problem? I have a
> 92 Jeep Cherokee L6 4.0L 4WD. Any help would be appreciated.
Get a fuel pressure gauge and check the regulator.
Normal is 214 kPa / 31 Psi
Fuel Pressure Regulator line disconnected 269-283 kPa / 39-41 Psi
lower than 31 then it's either the pump or the regulator. Only way
to check is with a clamp kit. Never use clamps on the factory fuel line.
--
DougW
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