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My 2000 3.0lt Nissan patrol was going fine I stop for about an hour went to start it again but it wont fire seems like the fuel pump not switching on. what could cause this problem ?

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Fuel pump or the relay.

Posted on Feb 06, 2015


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SOURCE: 1992 nissan patrol wagon 4.2ltr petrol


Posted on Dec 18, 2008

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SOURCE: 1997 chevy 2500 4x4 stumbles

Fuel pump is most likely the cause. Probably just barely making the required pressure to start. Needs to maintain 60-66 psi while cranking to start.

Posted on Dec 21, 2008

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SOURCE: 1997 Ford Explorer with 4.0 SOHC is flooding out at start

Its sounds like the fuel pressure regulator is bad locate the regulator on the fuel rail and remove the vacuum hose if there is fuel there its bad if not have some one turn the key on or crank the engine if fuel come out its bad. What seems to be happing when it sit for some time the regulaor leaks fuel by into the engine when you go to start it its just that its flooded out plus when you turn the key on and are trying to start it its now dumping even more fuel into the engine. When you remove the relay and crank it there is no fule going to the engine thus making it start.

Posted on Jan 08, 2009

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SOURCE: 2000 chevy silverado 1500 4.3 eng

Chevy Trucks, Blazers, S10 pickup and the like will vapor lock ecspecially the 2000 models. Do not tighten the gas cap past 1 click. There is a tube that runs from the top of the tank down and this gets hot and collapses or burns in half. We just bought a reinforced rubber tube cut it to lengh and use it instead of part and it's worked grat for 2 years so far.

Posted on Feb 01, 2009

  • 1486 Answers

SOURCE: car cut off while driving wouldnt start back up

Replace the switch.Yes they can be faulty.If that doesn't solve the problem then your fuel pump is causing it to trip out.change the fuel pump.good luck.

Posted on Jun 29, 2009

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My Nissan patrol gu 3l diesel will not start again if I park on a has to be reprised.why?

check your fuel line and fuel tank,make sure the fuel pump is working fine....thats what is needed.

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1 Answer

Why would my 2000 gu nissan patrol be going fine then switched it off for couple of hours and it wouldn't start seems like fuel pump not switching on what would cause this problem?

I assume this is a diesel engine. Diesels are usually problem free until they start aging. One reason could be that the header pump is on its way out. This is the pump that supplies the diesel fuel to the injector pump, Your car is 14 years old already, and it is time to pick up little hassles like this.
Have the pressure from the header pump checked by a technician / service station and compare this with the factory specification (which the technician / service station should be able to give you).
When last did you have the injector nozzles tested / replaced? The nozzles are much like spark plugs on petrol engines, they have a definite lifespan and should be checked and replaced after a while. They are not overly expensive. If the service station is not reputable they might ask a lot of money for the labor to replace and set them up, but that is one of the joys of motoring.
The Patrol is an excellent truck, I used to drive one with a breakdown hoist to tow in vehicles.

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