Circuit/System Verification
WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Verify that the engine is in good mechanical condition before continuing with this diagnostic.
- Observe the Engine Controls Schematic for the ignition coils/modules, and review the Ignition System Specifications and the spark plug inspection procedure to verify the following:
- The ignition coil/modules are correctly connected
- The proper firing order
- The proper spark plug type
- The proper spark plug gap and torque
Refer to Ignition System Specifications and Spark Plug Inspection .
- A moderate resistance on any IC control circuit can cause a misfire before DTC P0351-P0354 sets.
- Extended engine cranking time, may foul the spark plugs with excessive fuel.