Slow Idle

[Masteraustin]

Ive noticed that intermittently my idle will go down to ~400 when i come to a stop. Typically its around 600. It doesn't run rough or anything and A/C on or off doesn't make a difference.

 

Not sure if related but i was coming out of some hills in tow/haul mode and was costing and noticed my idle went down to ~100. I turned tow/haul off and it went back up to normal. I was doing about 40mph.

 

I have a '04 Silverado 1500 Crew Cab 5.3

 

Just wondering if any else has seen this before.

 

[gmtech4]

clean MAF gently with a sensor spray and a q tip ,air dry ,get both sides (q tip )

[txab]

Probably wouldn't hurt to clean the throttle body too

[Masteraustin]

Ill try the MAF, I should have a bottle of that in garage. The TB was just cleaned not to long ago but I'll check it out.