Question about 1998 Pontiac Grand Prix

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1998 Pontiac Grand Prix 3.8 won't start. Need some help, it has spark and fuel and compression. I can hear the injector pulse. Wife was driving it home from work friday and went out later and it would not start, she did say the check engine come on on her way home, but its not showing any codes. Where do i go from here?

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  • 3 more comments 
  • usadda123 Jul 07, 2010

    fuel pump is pushing 40/50 lbs

  • usadda123 Jul 08, 2010

    Tried spraying starting fuild in the intake,still no start

  • usadda123 Jul 08, 2010

    It has good compression on all 6 cylinders
    Fuel is getting to the plugs
    has spark on all 6

  • usadda123 Jul 09, 2010

    Getting the code ''Open Loop' anyone know what is means?

    '

  • usadda123 Jul 09, 2010

    Getting an " Open Loop code. Anyone tell me what is means and what to look for?

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  • Pontiac Master
  • 6,826 Answers

Check for fuel pump pressure,you may have a bad fuel pump.

Posted on Jul 07, 2010

  • 2 more comments 
  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jul 07, 2010

    Spray starting fluid in the intake,see if the engine will start.

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jul 08, 2010

    Check for spark,and look for fuel on the spark plugs,and also,you will have to check for compression in all cylinders

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jul 09, 2010

    Either the coolant sensor,or the mass airflow sensor are bad,go with the more logical,and cheaper solution first,the coolant sensor,closed loop has got to occur before the engine will regulate the fuel mixture ratio,and the coolant sensor has more to do with it than the mass air flow,if the coolant sensor does not help,replace the mass air flow sensor.

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Jul 09, 2010

    Also,check the air flow sensor,see if the air cleaner,and the box that it is in,has any restrictions in it,remove the air flow sensor,and look in behind it,and in the intake tube,just to make sure this is not the problem.

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Ok replaced the intake manifold , car wont start, checked crank sensor, checked plugs and wires. fuses, fuel injectors ,engnition sensor bad , replaced it coil packs good and still wont start .getting...


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