Question about 1991 Volvo 740

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Car sometimes wont start;sometimes cuts off while idling;sometimes cuts off while riding at normal speed.

Observations:when attempting to start for the first time of the day ive noticed that the fuel pump isnt coming on when key is turned to on position.
-when driving it seems like it has run out of gas but it does sputter or anything it just goes off as if someone has killed power to the fuel pump.
-it used to restart within 10 to 15 minutes, the last few times its taken over an hour and in that time i have, attempted at various intervals,to restart each time pausing at the on position to listen for the fuel pump but it is always absent.but,finally when i try to restart,and i pause to listen for the sound of the fuel pump i hear it.......thats when the car starts.from what ive read theres a solenoid valve that acts as a backup to the wastegate on the turbocharger, and under certain conditions it "if boost pressure exceeds a specified level,then the solenoid valve stops the fuel pump circuit and the fuel supply to the injectors"

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  • Anonymous Sep 08, 2008

    car will not start no current to fuel pump



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Dont worry about boost/replace the fuel pump relay behind the fuses (white,squire,tall)

Posted on Aug 26, 2008


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