Question about 1995 Pontiac Grand Am

1 Answer

Car will kick over when starting ignition but wont start

Q1 I have changed the alternator and the spark plugs but the car continues not to start. What is next???? Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!


Q2 I removed a spark plug and have found oil on one of plugs but no gasket leaks. Can some one tell me what to do please???

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  • 2 more comments 
  • kapone83 May 26, 2009

    no I havent heard anything from there. could that be the major problem with it

  • Raymond Ramirez
    Raymond Ramirez May 11, 2010

    yes and no. This maybe as simple as replacing the fuel filter. lets try it the easy way. first of all you are going to need another person. one person to crank the engine while the other goes to the back by the gas tank and kneels down. as to allow for the person to listen. the person should crank the vehicle only about 2-3 seconds. Normally there should be a humming noise coming from the fuel pump and should stay on for about 1-2 seconds after the stops cranking. If you can not hear it then we have a probem.



    First of all let me ask a few questions. do you let your gas tank get empty before filling it up. or have you recently runout of gas?



    The fuel pump is a high pressure pump that rotates very fast. the pump uses fuel to keep itself cool. if there is no fuel in the tank the fuel pump will overheat and fail.



    also

    check the fuel relay and fuse for the fuel pump. If the fuse has gone bad that maybe an indication that the fuel pump is shorting to ground.







    below I have inculded and explination of most vehicle fuel injected systems as to allow you to understand what is going on with your car. if you take your car to an automechanic you maybe able to understand what he is saying thats If you care to read.



    The vehicle:

    is equipped with a multiport fuel injection system.
    has separately controlled fuel injectors mounted to the intake manifold for each cylinder.
    fuel injectors are supplied with regulated pressurized fuel from the fuel pump through the fuel injection supply manifold (plenum or fuel rail)
    has a fuel injection supply manifold.
    has a fuel pressure regulator controlling the pressure going to the fuel injectors.


    Mechanical Returnless Fuel System

    The fuel system consists of a fuel tank with reservoir, fuel pump, fuel pressure regulator, fuel filter, fuel supply line, fuel rail, fuel rail pulse damper, fuel injectors, and Schrader/pressure test point. Operation of the system is as follows

    The fuel delivery system is enabled during crank or running mode once the PCM (Power Control Modual)receives a crankshaft position (CKP) sensor signal.
    The fuel pump logic is defined in the fuel system control strategy and is executed by the PCM.
    The PCM grounds the fuel pump relay, which provides VPWR (Vehcle power) to the fuel pump.
    The inertia fuel shut-off (IFS) switch is used to de-energize the fuel delivery secondary circuit in the event of collision. The IFS switch is a safety device that should only be reset after a thorough inspection of the vehicle (following a collision).
    A pressure test point valve (Schrader valve) is located on the fuel rail. This is used to measure fuel injector supply pressure for diagnostic procedures and repairs.
    Located on the fuel rail is a pulse damper. The pulse damper reduces fuel system noise caused by the pulsing of the fuel injectors. The vacuum port located on the damper is connected to manifold vacuum to avoid fuel spillage in the event the pulse damper diaphragm were to rupture (the pulse damper should not be confused with a fuel pressure regulator).
    The fuel injector is a solenoid-operated valve that meters the fuel flow to each combustion cylinder. The fuel injector is opened and closed a constant number of times per crankshaft revolution. The amount of fuel is controlled by the length of time the fuel injector is held open. The injector is normally closed and is operated by 12 volt VPWR from the power relay. The ground signal is controlled by the PCM.
    There are three filtering or screening devices in the fuel delivery system. The intake sock is a fine, nylon mesh screen mounted on the intake side of the fuel pump. There is a fuel filter screen located at the fuel rail side of the fuel injector. The fuel filter assembly is located between the fuel pump and the pressure test point/Schrader valve.
    The fuel pump (FP) module contains the fuel pump, fuel pressure regulator and the fuel sender assembly. The fuel pressure regulator is attached to the fuel pump in the fuel pump module located in the fuel tank. It regulates fuel pressure supplied to the fuel injectors. The fuel pressure regulator is a diaphragm-operated relief valve. Fuel pressure is established by a spring preload applied to the diaphragm. Excess fuel is bypassed through the regulator and returned to the fuel tank.




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    Electronic Returnless Fuel System

    The fuel system consists of a fuel tank with reservoir, fuel pump, fuel rail pressure sensor, fuel filter, fuel supply line, engine fuel temperature sensor, fuel rail, fuel injectors, and Schrader/pressure test point. Operation of the system is as follows (Figure 58) and (Figure 59):

    The fuel delivery system is enabled during crank or running mode once the PCM receives a crankshaft position (CKP) sensor signal.
    The fuel pump logic is defined in the fuel system control strategy and is executed by the PCM.
    The PCM commands a duty cycle to the fuel pump driver module (FPDM).
    The fuel pump driver module modulates the voltage to the fuel pump (FP) to achieve the proper fuel pressure. Voltage for the fuel pump is supplied by the power relay or FPDM power supply relay.
    The fuel rail pressure (FRP) sensor provides the PCM with the current fuel rail pressure. The PCM uses this information to vary the duty cycle output to the FPDM to compensate for varying loads.
    The engine fuel temperature (EFT) sensor measures current fuel temperatures in the fuel rail. This information is used to vary the fuel pressure and avoid fuel system vaporization.
    The fuel injector is a solenoid-operated valve that meters the fuel flow to each combustion cylinder. The fuel injector is opened and closed a constant number of times per crankshaft revolution. The amount of fuel is controlled by the length of time the fuel injector is held open. The injector is normally closed and is operated by 12 volt VPWR from the power relay. The ground signal is controlled by the PCM.
    A pressure test point valve (Schrader valve) is located on the fuel rail. This is used to measure fuel injector supply pressure for diagnostic procedures and repairs.
    There are three filtering or screening devices in the fuel delivery system. The intake sock is a fine, nylon mesh screen mounted on the intake side of the fuel pump. There is a fuel filter screen located at the fuel rail side of the fuel injector. The fuel filter assembly is located between the fuel pump and the pressure test point/Schrader valve.
    The fuel pump (FP) module is a device that contains the fuel pump and the fuel sender assembly. The fuel pump is located inside the reservoir and supplies fuel through the fuel pump module manifold to the engine and the fuel pump module jet pump.
    The inertia fuel shut-off (IFS) switch is used to de-energize the fuel delivery secondary circuit in the event of a collision. The IFS switch is a safety device that should only be reset after a thorough inspection of the vehicle (following a collision).

  • Clint Smock
    Clint Smock May 11, 2010

    what engine?

  • Raymond Ramirez
    Raymond Ramirez May 11, 2010

    Lets see what we can do. when you turn the key on not crank the car. just turn the key on. turn the radio off. do you here the fuel pump switch on for a second then off

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  • Master
  • 410 Answers

Sounds like your valve cover gasket is leaking oil into your spark plugs and is causing both of your problems.  if you have oil on one of your plugs then that plug can't fire correctly causing the car not to start.  I would suggest that you change the plug that has been fouled by the oil and check the wire if it got a lot of oil on it as well as the oil can degrade their ability to insulate, and the plugs will start arcing up the sides and engine will start misfiring. You should be able to change the valve cover gasket relatively easy with a couple of tools.  Hope this helps.  Thanks for ranking my response and for using FixYa!

Posted on May 26, 2009

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