h3 with an Iline 5 cyl stumbling/stalling at lights?

[DarkoStoj]

getting this ready to sell and I need to fix it. Its an 07 h3 with the 5cyl, and everytime you coast to a red light the engine stumbles a bit...its stalled only a couple times though. I don't have any codes in the computer. Anybody know what the problem is?

 

[cjmatt]

IAC

 

[LITTLEMAGS]

^^ yep.

 

[dave89iroc]

if that is throttle by wire, no iac, but clean the throttle body good

 

[forcefed92]

my caddy used to do that and i put new plugs and wires on it and it fixed it but that had about 100,000

 

[mustangmike6996]

Also could be an EGR valve sticking... (unless there is no valve and its cam controlled)

 

[fatblock]

One more here for decoking the throttle body blade.
Not uncommon though..to see a high idle speed after this type of cleaning.Some settle down with drive time,others require a reflash to the pcm.