We’ve all gotten used to starting a driveability diagnosis with the help of a DTC or two. Don’t panic when no codes are present. Instead, apply a logical procedure.
Why test? Because you’ll not only head off electrical breakdowns, you’ll also prevent subtle electronic glitches that can defy normal troubleshooting.
After reading this series, you’ll be on your way to becoming a fearless conqueror of EVAP maladies, not a fingercrossing gas cap tightener who hopes that the car will be assigned to someone else when it comes back.