attwood02

iTrader: (3)

As title, i have a funny idle on my standard 03 sti.
If you rev the car either in gear with the clutch dipped or out of gear as the rev needle drops back down it pauses at 1000 rpm then drops to approximatley 800 rpm. the car is always run on optimax and i have had the car for 12 months and not noticed this till recently. Was at subaru on friday as i wanted to make sure it was not the clutch and the guy said the clutch was fine. have also notice when starting the car from cold it seems to rev higher than normal till it warms up. Any suggestions, anyone had something similiar.
thanks

scoobynash

Sounds like an air mass fault.Ecu thinks it has a lot of air coming through and keeps fueling for a short period of time.Also may be a sticking injector.

tomdscooby

induction kit or standard air box?

if its got the standard air box check the lid is shut properly on it, or the fans will blow warm air into the box and cause an erratic idle.

this happened to me lol.i felt a twit when it was pointed out to me by a mapper!

Gaity

iTrader: (2)

If you've got a different DV then check the pipe going to this as on a previous 2003 Blobeye I owned it had poor idling which was down to this pipe hanging off

attwood02

iTrader: (3)

standard air box, the lid is on and have checked all the pipe work and thats all ok.
put some injector cleaner in today will see if that clears it

attwood02

iTrader: (3)

still doing it, any other suggestions?

Turbotits

iTrader: (2)

idle control valve a little lazy. maybe needs a good clean.

its meant to rev higher when its cold. normally about 1200rpm. Im not so sure you have a problem at all. It may just be the ecu holding the revs a little until you come to a stop to stop it stalling aspecially if your running with a load on the alternator or the aircon on

attwood02

iTrader: (3)

what should i clean it with? when cold the revs bounce up and down sometimes reaching 1900 rpm

Turbotits

iTrader: (2)

remove it and clean it with a good dose of carb cleaner.

attwood02

iTrader: (3)

just want to add some more infomation. when i press the air con button the revs dont go up and the dash back lights dim as if there is a power drain.

davedipster

Still sounds like the ICV, clean it.

dipster