Express 1/2 Ton Van V8-305 5.0L VIN M SFI (1998)
Correction
An improved EVAP (Emission Canister) Purge Solenoid Valve, P/N 1997277, has been released for the above condition. The new valve appears
identical to the unit it replaced. See Figure 1 - EVAP Purge Solenoid Valve, for location and P/N identification.
When diagnosing a suspected EVAP Purge Solenoid Valve for noise:
1.
Check for any stored DTC's.
2.
Disconnect the electrical connector (1) to the EVAP Purge Solenoid Valve and drive the vehicle.
Important:
This may set a DTC PO44O (EVAP Emission Control System Malf.) if this test is conducted during a cold engine start up.
3.
If the noise is gone, the EVAP Purge Solenoid Valve (5) is the source of the noise and should be replaced, as per the Service Manual procedure. If
the noise is still present, continue to diagnose the concern using standard diagnostic procedures.
4.
Clear DTC PO440, if set during the above procedure.
Parts Information
