GM 2.4L Index of Articles

Diagnosing a BAD Ignition Coil Quad 4 Case Study

Diagnosing a BAD Ignition Coil Quad 4 Case Study

Diagnosing a misfiring Quad 4 engine in all of the models that use this engine can be a challenge. This is a case study of one Pontiac Grand Am that was misfiring with only a P0300 Random misfire code stored in the vehicle's computer. This info...   read more >>

How To Test The GM 2.4L Throttle Position Sensor (TPS)

How To Test The GM 2.4L Throttle Position Sensor (TPS)

Troubleshooting and testing the throttle position sensor (TPS) or diagnostic trouble codes: P0121, P0122, P0123 on your 2.4L Quad 4 GM vehicle can be done on the car and with a simple multimeter. You won't need a scan tool to follow the steps in...   read more >>