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SportTrac Discussion
Engine & Drivetrain
Why is she dying?
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<blockquote data-quote="scott degroot" data-source="post: 797873" data-attributes="member: 66039"><p>It is possible that the fuel pump is losing power and thus causing the drop off in pressure, the only way you can make sure is to tap into the f/p power wire with a dvom and monitor the voltage as the incident occurs. With the mileage that is on your ST I wouldn't be surprised by a bad fuel pump... but you know if you replace it without checking the voltage then it will be an electrical issue. An easy place to check voltage to the pump(this assumes that the wire adn connection to the pump is good) is at the inertia switch in the kick panel, you can probe the pink/black wire(the power wire to the pump) and monitor the voltage there, if voltage stays above 10 volts and you lose pressure change the pump. If you want to eliminate the relay and the computer control of the relay pull the fuel pump relay out of the underhood fuse box and jump pins 30 and 87 together, as soon as you do this the pump should start to run as it is basically hotwired to battery voltage.</p></blockquote><p></p>
[QUOTE="scott degroot, post: 797873, member: 66039"] It is possible that the fuel pump is losing power and thus causing the drop off in pressure, the only way you can make sure is to tap into the f/p power wire with a dvom and monitor the voltage as the incident occurs. With the mileage that is on your ST I wouldn't be surprised by a bad fuel pump... but you know if you replace it without checking the voltage then it will be an electrical issue. An easy place to check voltage to the pump(this assumes that the wire adn connection to the pump is good) is at the inertia switch in the kick panel, you can probe the pink/black wire(the power wire to the pump) and monitor the voltage there, if voltage stays above 10 volts and you lose pressure change the pump. If you want to eliminate the relay and the computer control of the relay pull the fuel pump relay out of the underhood fuse box and jump pins 30 and 87 together, as soon as you do this the pump should start to run as it is basically hotwired to battery voltage. [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Why is she dying?
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