Part of the smog check includes verifying proper ignition timing, so double-check the timing before you get to the smog station. Timing can vary above or below factory specifications, within limits.

The smog technician usually provides a form showing the reason your car failed and its emissions levels. Bring this to your mechanic to find out if they know how to fix the problem.

Staying up to date on car maintenance and taking care of check engine lights could help you pass the all important smog test.