Question about Ford Five Hundred
Theres a tsb for a faulty fuel pump........
Access the fuel pump connector.
Monitor voltage between the White/Red (WH/RD) and Black/Yellow (BK/YE) wires, leaving the fuel pump connected. Also monitor the fuel pressure.
Voltage will normally be about 6-8v at idle and will increase with load on the engine.
Drive the car to try and duplicate the complaint. When the problem is occurring, check the fuel pressure vs. voltage to the fuel pump. If pressure is dropping but voltage is the same or increasing, check the connections right at the fuel pump. If OK, drop the fuel tank, inspect the lines internally and replace the fuel pump as needed.
Posted on Oct 21, 2008
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