Dieseling, Run-On. Buick Park Avenue 2004

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2004 🢒 Park Avenue 🢒 Engine 🢒 Engine Controls - 3.8L (L36 and L67) 🢒 Dieseling, Run-On

Checks

Action

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

Preliminary Checks

•	Refer to Diagnostic System Check - Engine Controls .

•	Refer to Important Preliminary Checks.

•	Refer to Visual/Physical Checks.

Fuel System

Test the fuel injectors using the following tests:

•	Refer to Fuel Injector Solenoid Coil Test .

•	Refer to Fuel Injector Balance Test with Tech 2 .

Additional Checks

Test for short between B+ and any of the ignition feed circuits.