Circuit/System Verification

WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

Verify that the engine is in good mechanical condition before continuing with this diagnostic.
Verify the following conditions:
- 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 .