Dieseling, Run-On. Pontiac Firebird 1999

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 1999 🢒 Firebird 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Dieseling, Run-On

Checks

Action

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

Preliminary Checks

•	Refer to the Symptoms .

•	Search for bulletins.

Fuel System

Check the Fuel Injectors.

•	Refer to Fuel Injector Solenoid Coil Test - Engine Coolant Temperature Between 10-35 Degrees C (50-95 Degrees F) .

•	Refer to Fuel Injector Solenoid Coil Test - Engine Coolant Temperature Outside 10-35 Degrees C (50-95 Degrees F) .

Additional Check(s)

Check for short between B+ and any of the ignition feed circuit. Refer to Intermittents and Poor Connections Diagnosis .