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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?

Checked power to glow plugs seems to be fine

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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.

Posted on Dec 15, 2014


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Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

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