GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 Sonoma Pickup - 2WD 🢒 Engine 🢒 Engine Controls - 2.2L (L43) 🢒 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 Symptoms .
    • Search for service bulletins.

Fuel System

Check the fuel injectors for a possible leak at the pintle. Refer to Fuel Injector Balance Test .

Additional Checks
    • Check for short between B+ and any of the ignition feed circuits. Refer to Wiring Repairs .
    • An engine with accumulated miles could experience a build up of carbon in the cylinders. This may also show symptoms of spark knock associated with a run on condition. Use ONLY an approved cleaner that is compatible with ethanol in the fuel tank.
    • Check for spark plugs with an incorrect heat range.