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Matt
Matt, Mechanical Engineer
Category: UK Car
Satisfied Customers: 21599
Experience:  BEng hons Mech engineering, in auto industry 22 years
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08 transit tipper 100hp cuts our whilst driving. Then

Customer Question

08 transit tipper 100hp cuts our whilst driving. Then struggles to start i.e won't turn at all. Maybe 10 try later may start
Submitted: 1 year ago.
Category: UK Car
Expert:  Matt replied 1 year ago.

Hello

1st check the connections to the crankshaft sensor, unplug itand check for corroded contacts and broken wiring, and consider fitting a newsensor - do the same for the cam position sensor

If the EGR valve is stuck open then this too can effect starting so try disconnecting it to see ifthis helps or changes anything

Could also be an injector leaking fuel back through the overspill pipe, so not getting enough fuel pressure to tell ECU to fire the injectors, this is trickier to find and you’ll need the garage to do a ‘run back’ test to identify which one is the issue

Lastly it’s also worth considering fitting a new fuel filter as if only slightly blocked this can lower fuel supply pressure and choke the main pump, the pump will be more sensitive to this when its cold as diesel thickens considerably with low temperatures.

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 filterhousing, 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 1 year ago.

Hi

do you still need help?

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