butler

On my 97 sti when driving then come to a stop the revs start to drop till the car almost stalls then climb again to about 1100 rpm then down again, does this for about 20-30 seconds then returns to normall. Anyone have any ideas to problem? Cheers

andyzx6r

iTrader: (3)

it sounds like your idel control switch that might be on it's way out, or have you ever changed he spark plugs

butler

Only changed the spark plugs 4 month ago and not done many miles in them. Is there a way to check the idle control valve? Forgot to mention engine is totally standard.

andyzx6r

iTrader: (3)

have you got a engine management light on? if so this could tell you your problem?

butler

Engine light does not come on mate.

scooby-wrx

Hey mate, I had the opposite problem. Mine idled high... Managed to narrow it down eventually, check this link to view the idle control valve. I posted pics of mine.

High Idle problem on my RA...? [Archive] -

Good luck!

chocolate_o_brian

iTrader: (22)

hi fella. i had a similar problem on my my99 uk turbo last year. pop the idle control valve off and give it a good clean out with some brake/clutch cleaner.

jason @ scoobybits suggested this and i do it say every couple months now.

car may splutter for about 5-10 mins and refuse to start, but it definatley soled my problem, especially when cold.

id presume the same method on an sti would help, but dont take me as gospel