ive had this problem on 2 cars now.

symptoms:

cold start idle surge (1200rpm-1500rpm)

cel 14 (iacv)

feels like tps has dead spot from 0%-20% (sucks for cruising cause the throttle acts like an on/off switch)

once the engine comes up to operating temp the idle is perfect and it doesnt trigger the cel right away. it also wont act like there is a dead spot as often.
but once the cel comes on, the dead throttle spot is constant.

the cel will clear instantly if i cycle the key.

i looked around for this problem and didnt come up with anything..

in crome the idle controls are at 900rpm and 8% iacv compensation..nothing crazy i thought..

thanks,
jack

 

Try cleaning the IACV with brake or carb cleaner. You could also test if the IACV is causing the TPS dead spot by disabling it in a P30/P72 or Gold map.

 

thanks man i didnt know it could be disabled
ill try that

 

THE PROBLEM WAS THAT THE INJECTOR RESISTOR BOX WAS WIRED INCORRECTLY.
FIXED