Dieseling, Run-On. GMC Truck Sonoma Pickup

For 1990-2009 cars only

Makes 🢒 GMC_Truck 🢒 1997 🢒 Sonoma Pickup - 4WD 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Dieseling, Run-On

Checks

Action

Definition: The engine continues to run when turn the key OFF, but runs very roughly. If the engine runs smoothly, check the ignition switch and adjustment.

Preliminary Check

Refer to Important Preliminary Checks .

Fuel System Checks

•	Check the Evaporative Emission (EVAP) system and fuel tank venting.

•	Check the fuel injector(s) for leakage.

•	Perform a fuel system diagnosis. Refer to Fuel System Pressure Test .