LLY: Idle surge

[Midnightrider]

My truck surges very slightly at idle. I will pulse about 75 to 100 rpm. Im not sure what it is i was thinking maybe a dirty maf or a map sensor going bad. Any help is appreciated. thanks guys

 

[05dmaxdriver]

Fuel pressure regulator

 

[Midnightrider]

where is the fpr located on the 6.6

 

[JoshH]

Buried in the valley attached to the CP3 pump.

 

[LarryJewell]

have you adjusted pulse width in the idle area

 

[Midnightrider]

have you adjusted pulse width in the idle area

its a bone stock tune