Question about Nissan Pathfinder

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Wont start when hot!

Our 1998 ,gu model, nissan patrol 4x4 turbo diesel, starts ok when cold but sometimes wont startwhen hot but it does occasionally start when run started. We have had the shim replaced in the fuel injectors and had timing done on the vehicle but it has done nothing to rectify the problem. Please help us.

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I agree that the problem is most likely fuel boiling off in the injectors due to heat aside from replaceing all the injectors
you are gonna have to open the hood AND hold down the purge valve and have someone crank it for you
but also don't give up yet have ya tried opening up the gas cap vent hole a bit more?

Posted on Jul 21, 2009

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Hello there, wow my dream p-up. nissan pathfinder 4x4,  unfortunately i have to settle with my nissan navara truck. anyways, the possible problems would be the injectors and injection pump. injectors are really direct on the combustion chamber so everytime the engine runs it is severely exposed to very high temperatures. the nozzle tips are the ones very much abused. the injectors have 2 seals. the first one which hugs the body of the injectors which is usually made of hard copper and the 2nd is called the chamber washer which is a stainless steel type concaved washer which serves as the nozzle tip seal and heat nozzle tip heat dispenser. if the nozzle tip floats there is a tendency that the tips are flame red due to heat thus, diesel is boiling to the point of turning to vapors enough to push the remaining fuel back to the injection pump when you shut the engine. then the one way valves of the injection pump comes into play. the valves might be weak and due to the high pressure, fuel slowly creeps back into the pump body. hope this helps.

Posted on Apr 16, 2009


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