my car doesnt idle smooth at all with uberdata but with my obd2b ecu it runs perfect and my iacv is blocked off cuz i broke the nipple off. what is the iacv adjust and what is it adjusting. would it help out my idle? i put my timing at 12 and fuel pressure at 33.i also read that you should advance the timing in the idle thing. but once the car is warmed up it idle pretty good and doesnt flucuate as much.

 

here is what i found on the pgmfi board

iacv adjust, aka iacv slider, is used to adjust your iacv (idle air control valve) which controls the amount of air let in to the tb at idle, commonly used to fix fluctuating/surging idle.

sorry if that doesn't help much but i tried


whats your setup? i used to have alot of idle problems with uber but most of that went away agter switching to CROME

 

my civic is stock right now y8 but im new to uber and im just trieing to get familiar with it before i put in my rc440s and my turbo kit. is it possible to get my idle smooth when its cold? should i add or subtract on the iacv adjust.

 

I never got the cold idle right using Uberdata. I just put a piece of rubber hose in the inlet side to make my own orifice. That took care of it.

 

Ive had the EXACT same prob for almost a year now. Tried blocking off IACV, nothing. Tried increasing/decreasing fuel, helped for bout 10 mins then same ----. Tried messing w/ timing, nothing. Figured it was just my ECU but after testing, its UberData. Gonna try to fix w/ Crome eventually. If you ever get an answer, LMK. Ild figure WB tunning should be a sure fix for this.

 

Take off the fast Idle valvle, take the plate off and screw in the spring loaded mechanism. The should clean the cold start idle up.