95greenZ

iTrader: (2)

Hey guys I'm a new member here, I bought a 03 Silverado couple weeks ago. Anyway over the weekend I cleaned the throttle body and now it idles a little high, and when I come to a stop it takes a few seconds before the rpms will come down. I did take the throttle body off to clean it so I guess the gasket may not be sealing. Or could it be the electronic throttle body? Any ideas?

trever1t

iTrader: (14)

sounds like an air leak....

terravast4

iTrader: (25)

did you reconnect the hose from the passenger valve cover to the intake tube?

dewey04

iTrader: (7)

recalibrate the throttle body

95greenZ

iTrader: (2)

I don't remember a hose being there, but I'll double check.

How exactly do you do that, tuning software?

dewey04

iTrader: (7)

First check for air leaks. Spray carb cleaner around the intake and throttlebody with the truck running if the idle picks up you have a vacumm leak. If that does not work and you do not have a scan tool that will recalibrate the throttle body un hook the battery negative for 10 min. that will allow the computer to reset. it will usually take a day for the computer to re learn the air fuel mixture and then resume running normal. Also get a can of mass air flow cleaner and clean the mass air flow sensor if you have some miles on the truck.

05gmcsierra

iTrader: (3)

ive done this also and the same thing has happened to me... u just need to drive around and wait for the computer to relearn the idle.. im assuming since u cleaned it its getting more air causing it to idle high.. mine usually takes about 1 full day of driving around till it adjust itself and comes back to normal.. but idk it might be something else..