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Bruce 10/1/2012
1998 Buick Century Custom 6 Cyl 3.1L - Engine
My car hesitates and some times stalls at stop signs.Some days it runs good and the check ingine light stays on .
2 Answers
  • CVO
    CVO 10/2/2012
    Check the vehicle for fault codes to see if there are any sensors were involved to the malfunction of the engine.

    1.Local auto parts stores such as Autozone ( not in California) or Advance Auto parts will scan and retrieve any diagnostic trouble codes ( dtc ) stored in the powertrain control module for free of charge..

    2. has the code reader for less than $20.00 dollars.

    3.Re-post the dtc's in here " answer question " for further assistance.

    Note: we need the dtc's to identify the sensor, there are a dozen different sensors to operate the car.

    Visit this site and see all the different sensors.

    Navigate to this site and see the code reader
  • Bruce
    Bruce 10/5/2012
    CVO 10/5/2012
    P0302 Code - Cylinder #2 Misfire
    Faulty spark plug or wire
    Faulty coil (pack)
    Faulty fuel injector
    Burned exhaust valve
    Poor compression

    P0336 Crankshaft Position Sensor Range/Performance
    Bad crank sensor
    Wiring open in CKP circuit

    Evaporative Emission Control System Leak Detected (small leak)
    A loose or improperly affixed gas cap
    A non-conforming gas cap
    A small leak/hole in a fuel vapor hose/tube
    Other small leak in EVAP system

    CVO 10/6/2012
    A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.

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