How will I know if my throttle body need to be cleaned. On my 2002 yukon. .

Arnie Burke

• 7339 Answers
• Posted on Sep 13, 2009

SOURCE: idle up and down 2002 yukon xl

ur idle air control or tps sensor needs inspection-

SOURCE: Needing to know what a BCM(Body Control Module) does.

it control warning
door locks
lights
alarm

SOURCE: need to clean out throttle body on 2002 chevy

I would use Gumout and an old toothbrush, usually works good to get the carbon for the throttle plate and throttle body.

Ryan Lutton

• 1267 Answers
• Posted on Feb 21, 2011

SOURCE: How to clean throttle body on 2002 chevy trail

Instructions for doing it without removing the throttle body.

1. Disonnect the battery....very important so your stepper motor isn't ruined when moving the butterfly.
2. Remove the plastic resonator on the top of the engine (The black piece that says 4200 on it)
3. Remove the large rubber hose from the throttle body.
4. Clean away, with throttle body cleaner or Seafoam, I just use the blue shop towels to clean in there. Could use a plastic bristle brush also for more elbow grease. Be very careful, as the butterfly will cut you very easily, very sharp edges. Make sure you get all the gunk out of there, including any edges of gunk that may have formed, preventing the butterfly from opening and closing properly. Needs to be nice and shiny.
5. Hook the resonator and hoses back up, don't forget the little pcv hose on the front right corner of it.
6. Hook the battery back up and drive around for 20 minutes or so with all accesories OFF. The computer will relearn a properly functioning throttle body at that point.
7. Enjoy a little bettery gas mileage and horsepower.

Ryan Lutton

• 1267 Answers
• Posted on Jun 07, 2011

SOURCE: I was cleaning the throttle

If the throttle body is clean now, disconnect the battery for 30 minutes or so. Hook it back up and drive around for 5 miles or so with all accessories off. This will reset your computer and recognize the now properly functioning throttle body.