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Matt
Matt, Mechanical Engineer
Category: Hyundai
Satisfied Customers: 20604
Experience:  BEng hons Mech engineering, in auto industry 22 years
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The car drives but the power dies off and when I squeeze the

Customer Question

The car drives but the power dies off and when I squeeze the diesel pump situated in the engine it regains power and drives normally, please help!!
Submitted: 11 months ago.
Category: Hyundai
Customer: replied 11 months ago.
I forgot to say it's a terracan 2.9 diesel.
Expert:  Matt replied 11 months ago.
Hello I'd say that 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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