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Matt
Matt, Mechanical Engineer
Category: Nissan
Satisfied Customers: 20608
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Nissan qashqai 2007 cut out while driveing prime the bubble

Customer Question

nissan qashqai 2007 cut out while driveing prime the bubble near the fuel filter starts up and runs for 10-15 mins and cut out again done a diagnostic check code come up p0087 low rail pressure
Submitted: 10 months ago.
Category: Nissan
Expert:  Matt replied 10 months ago.
hello this sounds like it may have developed an air leak on the fuel supply pipe from the tank to the engine. The engine has no separate lift pump and relies on the built in one in the injection pump. If a leak has developed on the fuel suction pipe then air entering the system will air lock the pump.Try pumping up the fuel using the hand pump in the engine bay on the filter housing, then crack off / loosen each injector pipe in turn while cranking the engine and getting an assistant to operate the primer. This will expel air from the injection side and the engine should fire up. The problem will be cured by checking the supply pipe along its length for signs of leakage and repairing any you find.If you daub each pipe joint with heavy grease and the issue goes away then wipe the grease away one at a time to highlight the problem joint
Expert:  Matt replied 10 months ago.
Hi
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Customer: replied 10 months ago.
Hi found a leak near the diesel tank replace fuel hose took it for a test drive and engine light came on diagnostic check showin p2263 turbocharged current
Expert:  Matt replied 10 months ago.
Hello
OK I'd first check all the high pressure hoses post turbo/s for any split hoses or cracked metal pipes, also check the ends of the intercooler as its not unheard of to pop the end caps off under high boost.
If this is OK then check the small vacuum lines to the turbo and its connected control solenoid on the bulkhead, any cracks or leaks can give turbo issues
Also have a feel around with your bare hands with the engine running to see if you can feel any escaping gas under your touch. Another method is to use a soap and water solution sprayed onto any suspect areas - if there's a leak it'll bubble up with the engine running
Also check that the vacuum hose running to the dump / turbo bypass valve is intact with no leaks as if the dump valve is opening prematurely you'll be losing all your boost
If this is OK then remove the high pressure intake hose after the turbo and have a feel of the turbine wheel - there should be no play radially at all - but a little bit of axial / end to end float is normal
one other possibility is that the wastegate actuator spring has gone soft so allowing the wastegate to open prematurely - if your actuator has a threaded end you can increase the preload on it to see if this improves things otherwise these units are quite cheap compared to a new turbo so it may be worth trying a replacement
Expert:  Matt replied 10 months ago.
Hi
do you still need help?
Bear in mind that the site takes a deposit from you at the beginning and this is held by the site until you rate my answer at which point the cash is split between the site and the expert. I am only paid for my work on this question if you rate my answer, using the star system at the top of the screen. Please do not forget! Thank you

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