Test Description
WARNING: This page is about a different car, the 2003 GMC Sonoma and 2003 Chevrolet S10 Pickup. However, it is still accessible from the selected car via links, so may be relevant.
The numbers below refer to the step numbers on the diagnostic procedures.
- 2 - This step checks for a leaking EVAP purge solenoid.
- 4 - Removing the fuel fill cap will equalize the pressure inside the tank with atmospheric pressure. At zero in. H2O, the FTP sensor should be about 1.5 volts. If FTP is not, there is a concern with the sensor or related wiring.