• Assure there are no codes present. If there are any codes, repair as necessary before continuing with the following
procedure.
• Start engine and verify rough idle concern. Slightly accelerate engine off of idle, does the engine smooth out? If it does, proceed with the following diagnostics.
• Using WDS (World Diagnostic System) monitor Power Balance. Typically there are two injectors indicating weak cylinders.
These two injectors will be 180 degrees off in firing order (firing order is 1,2,7,3,4,5,6,8). For example, #3 & #8 will indicate weak cylinders.
• Perform a Mass Fuel Desire Test to verify these injectors are contributing correctly.
• If they indicate no problem found, select #1 INJ PID. With the solid border surrounding the PID, enable active command control for injector cancel. Take control of the Active Command but DO NOT toggle “+/-” to disable/cancel the injector.
• Notice the idle quality while performing this function. If the engine smoothes out, this is a good indication of a bent trigger wheel.