Question about 1994 Volvo 940

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I have a 1994 Volvo 940 Turbo. Just lately it has been hard to start. It will crank but won't fire. Sometimes it fires but won't stay running. At first it was doing this only when the engine was warm, but now it does it first thing in the morning, but not every time. Very erratic. It acts like it's flooded though it's been sitting overnight. After enough tries(and sometimes pushing the accelerator to the floor), I can eventually get it started and it runs fine. Had trouble with a fuel pump relay before. Could it be that again?

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Spray some gum out in air flow sensor and see if it starts up.
If it does you need a new fuel pump. To confirm look for schrater valve on fuel rail, put a rag around it and wear eye protection. Push valve and see if fuel shots out while the vehicle IS NOT RUNNING. I fuel does not shoot out you have no residual pressure and need a new pump.
The other thing is to place key in ignition and put it to on position you shoulsd hear a buzzing sound from pump.

Posted on Aug 19, 2010

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