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My 2001 pontiac grand am gt wont start. its turning over just fine and acts like it wants to start but it doesnt. fuel pump was just replaced 4 months ago as well.

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  • Pontiac Master
  • 11,486 Answers

Does the vehicle have spark ? Do you know what that is an how to check for it ? Is there a SECURITY light lit on the instrument cluster ? If the vehicle has spark spray some carb. cleaner into the engine an see if it starts then .

Posted on Apr 16, 2017

Testimonial: "see this happened to me 3 times now. the first time it ever did it the security light was on so i did the turn it on for 15 min and then turn it off and it started right up. the second time it did this i tried the same thing didnt work, the fuel pump was bad so got that replaced. now this time about a week ago the secuirty light came on one but it started up, and then week later it wont start. not sure if that is the problem or if its fuel pump again or what it is. but i dont know where to even spray that stuff you said in the engine."

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  • Jeff Armer Apr 16, 2017

    Do you know where the air filter is ? Black rubber tube from the air filter box goes to the throttle body . Take that rubber tube off an at the engine side that is where you spray that stuff in > It's carburetor cleaner or starting fluid . The anti-theft system on your vehicle will disable the fuel injectors if this is the problem .

  • Jeff Armer Apr 16, 2017

    The 15 min. thing you mention is really just a 10 min. thing . Here is factory service manual steps

    10 Minute Learn Procedure
    Tools Required:
    None

    Turn ON the ignition, with the engine OFF.
    Attempt to start the engine, then release the key to ON (vehicle will not start).
    Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
    Turn OFF the ignition, and wait 5 seconds.
    The vehicle is now ready to relearn the Passlock™ Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK.
    Important: The vehicle learns the Passlock™ Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

    Start the engine. The vehicle has now learned the Passlock™ Sensor Data Code and/or password.
    With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.

  • Jeff Armer Apr 16, 2017

    This provided that is the problem ! If this problem persites your bettery off having it diagnose at a qualified GM service center . There are a number of diagnostic trouble codes that can be set !

    DTC B2947
    DTC B2948
    DTC B2957
    DTC B2958
    DTC B2960
    DTC B3031
    DTC B3033
    DTC P1626
    DTC P1630
    DTC P1631
    DTC P1632

    The Passlock™ system is provided in order to prevent vehicle theft if the ignition lock cylinder is forced to rotate or the ignition switch is operated while separated from the ignition lock cylinder case. The body control module (BCM) provides security system sensor power and low reference for the Passlock™ sensor. The BCM also measures the security system sensor voltage.

    When the correct key is used to start the vehicle, a magnet on the lock cylinder passes close to the Passlock™ sensor within the ignition lock cylinder case. The magnet activates the security hall effect sensor in the Passlock™ sensor which completes a circuit from the security sensor signal circuit through a resistor to the security sensor low reference circuit. The resistance value will vary from vehicle to vehicle. The BCM will measure the voltage on the security sensor signal circuit and compare this voltage to a previously learned voltage. If the voltage measured is within the valid range, the BCM will send a class 2 message to the powertrain control module (PCM) to enable vehicle starting. If the voltage measured is not within the valid range, a class 2 message will be sent to the PCM to disable starting of the vehicle.

    There are videos on youtube on how to do by-pass on these anti-theft systems , I don't know how well they work or if they work at all . I'm a GM trained factory service technician . I have had to fix some of these so called fixes when they didn't work. Cost the customer alot more then if they had it fix the correct way in the first place .

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Posted on Jan 02, 2017

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