Test Description

WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedures.

2

This step verifies that a failure condition is active.

4

Introducing smoke in 15 second intervals may allow smaller leak areas to be more noticeable. When the system is less pressurized, the smoke will sometimes escape in a more condensed manner.

6

This step verifies proper operation of the FTP sensor.

7

A normal operating FTP sensor should increase above 5 in. of H2O and Stop between 6 inches of H2O and 7 in. of H2O.

9

This step tests the EVAP purge valve vacuum source between the EVAP purge valve and the Intake manifold for restrictions or blockages.