Diagnostic Aids
WARNING: This page is about a different car, the 2004 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Operate the vehicle under the condition of the customers concern. Under high temperature conditions fuel vapors may increase to the point of EVAP canister vapor saturation. Fuel vapors would then be released into the atmosphere. Once the engine is running and EVAP purge is enabled, all fuel vapor release would be eliminated.
- Test for fuel leaking in the following locations:
- The fuel tank
- The fuel feed pipe
- Test for fuel vapor leaks in the following locations:
- The fuel tanks, fill limiter vent valve, and rollover valves
- The fuel fill pipe, hose and fuel fill cap
- Both fuel sender housings and seals
- The fuel tank pressure (FTP) sensor seal
- The EVAP vapor pipe
- The fuel crossover tube
- Movement of the EVAP pipes or fuel pipes may help find an intermittent condition.