jeffwrx

iTrader: (50)

Car idle's at about 550 rpm, does that seem right for a 05 Sti UK, seems too low as nearly stalls,
What is correct idle speed, and is there any way to fix it, -clean the icv or replace?
Car is showing no fault coded,

Thanks

chocolate_o_brian

iTrader: (22)

Do you run a VTA chumpvalve?

jeffwrx

iTrader: (50)

No chump valve lol
Car is standard ppp sti

chocolate_o_brian

iTrader: (22)

Good man. Look at idle control valve, and maybe maf. Does the issue stop once warmed up or is it there all the time? Throttle position sensor?

Turbotits

iTrader: (2)

half way ish between the 0 and 1 on the rev counter there is a line. It should idle just about on this line. although its half way between 0 and 1 its not 500 its around 750/800. is the idle pretty smooth?

jeffwrx

iTrader: (50)

That sounds ok then, as it sits on that middle line, yes idle is smooth, but take a few seconds to settle,

Have just thought , only had this problem since I change battery, does dissconecting battery reset ecu?