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Bruce

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. Amazon.com 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.

http://www.freeautomechanic.com/car-engine-sensors.html

Navigate to this site and see the code reader
http://www.amazon.com/.../...imh_gw_p263_d1_i1

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Bruce

Bruce 10/5/2012

po302,po336.po442.po300

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Bruce

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

p0442
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

Bruce

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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