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Matt, Mechanical Engineer
Category: Toyota
Satisfied Customers: 20374
Experience:  BEng, Repaired my own cars and others for 20 years, worked in Formula 1 for 10 years
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Just replaced fuel filter it started then stopped after alot

Customer Question

hi there just replaced fuel filter it started then stopped after alot of priming it started then stopped put tool on car and fuel pressure is only at half 20.000kpa what could be the problem thanks
Submitted: 3 months ago.
Category: Toyota
Expert:  Matt replied 3 months ago.


I'd suggest the 1st thing to check is if the filter is seated correctly in its housing as if its out of position then this can choke the main pump

if this is OK then 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 3 months ago.


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