Dieseling, Run-On. Oldsmobile Shelby Series 1 1999

For 1990-2009 cars only

Makes 🢒 Oldsmobile 🢒 1999 🢒 Shelby Series 1 🢒 Engine 🢒 Engine Controls - 4.0L 🢒 Dieseling, Run-On

Checks

Action

DEFINITION: The engine continues to run after the key is turned OFF, but runs very rough. If the engine runs smooth, inspect the ignition switch and the ignition switch adjustment.

Preliminary Checks

•	Refer to Important Preliminary Checks Before Starting in Symptoms .

•	Search for bulletins.

•	Inspect the powertrain control module (PCM) grounds for being clean, tight, and in the proper locations. Refer to Engine Controls Schematics .

Fuel System

Inspect the injectors for a leaking condition. Refer to Fuel System Diagnosis for the proper procedure.