Question about 2005 Ford Five Hundred

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Ford 500starts but will not stay running even when I step on the gas. On restart it does same thing. Runs for a few seconds.

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  • gunnerres Sep 17, 2010

    I do have a multimeter.

  • gunnerres Sep 20, 2010

    This past weekend Ithe owner of the Ford Five Hundres tried to start the car (nothing has been worked on) and the car started for a few seconds but she noticed the tachometer was bouncing upand down. The battery and engine light came on during this process. The car then died when she stepped on the gas. Need more help please.


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Hello! I suspect the Accelerator Pedal Positioning Sensor is defective...It can be tested...Let me know if you have a multimeter and feel confident to perform voltage readings...Send a comment


Posted on Sep 17, 2010

  • 1 more comment 
  • David Burbee
    David Burbee Sep 17, 2010

    Hello! The electronic control systems on your vehicle are complex...The #1 suspect, as mentioned, is the APPS...#2 suspect is the Electronic Throttle Control Module (ETC)...#3 is the Mass Air Flow (MAF)...If the ETC module or MAF are defective the computer will sense their failure and set a trouble code...Since the Check Engine Light isn't on, it is unlikely that either sensor is causing the fault...Therefore the prime suspect is the Accelerator Pedal Positioning Sensor (APPS)...It is the pedal itself and cost around $80 to replace...It has an 8 pin connector with 7 pins in use...With the following wire colors...Gray/Yellow...Yellow/White...Gray/Red...White...Tan...Tan/Yellow...And White/Red...

    To be absolutely certain, before you spend any money, the sensor can be tested...Send a comment and I'll send the test procedure....Saailer

  • David Burbee
    David Burbee Sep 17, 2010

    Hello! Using safety pins, push a pin into the rear of the in-place connector on the APPS into the following locations...Gray/Yellow...White/Red...White...And Yellow/White...Making sure pins bottom out against the connector pins...Set the meter to read max of +5 volts...Connect the - probe of the meter to the Gray/Yellow pin...The positive meter probe connects (first reading) to the White/Red...Second to the White...And lastly to the Yellow/White...

    Turn the key to on...Record reading at White/Red...Then White...Then Yellow/White...
    Repeat the test, only this time (at each location) gradually press the pedal down...The voltage must increase to 4 volts in a smooth fashion...If meter reading jerks, or acts erratic as you slowly press down on the pedal the sensor is defective...If you need assistance don't hesitate to ask...Saailer

  • David Burbee
    David Burbee Sep 20, 2010

    Hello! The Check Engine Light means there is a trouble code stored...Run a scanner (OBDII) to determine the code...Battery light is indicating no alternator output...Remove alternator and have it tested...The APPS is still suspect...#1...We need to see what code is being pushed...#2...Charge battery and try and start the engine...#3...APPS can be tested with key in the on position (still primary suspect)...Send a comment...I am here!....Saailer


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