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Matt
Matt, Mechanical Engineer
Category: Volvo
Satisfied Customers: 20594
Experience:  BEng hons Mech engineering, in auto industry 22 years
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My problem is with a volvo fm7 treg will not start cant

Customer Question

hi my problem is with a volvo fm7 treg will not start cant get the fuel to prime to the filter nothing but air coming through i washed the vehicle wednesday night ready for test it started allright after wash brought it down off the ramps in about 5 mins it stoped weve changed the filter blown air from tank fuel comes up but not by priming
Submitted: 1 year ago.
Category: Volvo
Expert:  Shantal-Mod replied 1 year ago.
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Expert:  Shantal-Mod replied 1 year ago.
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Expert:  Matt replied 1 year ago.
Hello 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 1 year ago.

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