very high idle

Flip_x · Post by **Flip_x** » Mon May 02, 2005 8:00 am

my car is idling at 2k right now if i rev it to say like 4k it will stay there and slowly drop to 2k. it wasnt like that earlier then it just did it. what could be wrong. what would make it stuck at that rpm? its annoying me. thank you

BAC5.2 · Post by **BAC5.2** » Mon May 02, 2005 2:01 pm

IAC.

It seems there are a lot of IAC related issues lately.

Do you ever get fuel cut?

Flip_x · Post by **Flip_x** » Mon May 02, 2005 5:13 pm

no. the throtle just seems to get stuck.

Flip_x · Post by **Flip_x** » Mon May 02, 2005 5:38 pm

i was reading in the other threads that the tps can get wet when it rains. it rained here for the past few days. u think it may have messed up the tps? the revs go back down but takes a while.

Post by **Legacy777** » Mon May 02, 2005 6:11 pm

check and see if any codes are stored. Also try resetting the ECU after you have checked for codes.

Did it happens all of a sudden? Did you change or do anything in between the point it idled fine, and now?

BAC5.2 · Post by **BAC5.2** » Mon May 02, 2005 6:24 pm

Flip_x wrote:no. the throtle just seems to get stuck.

The IAC is the Idle Air Control valve. When it's cycle is disturbed, it will remain open and cause higher than normal idle, exactly what it would be like if the throttle stuck.

I don't have a diverter under the hood scoop, and I've yet to have an issue with rain and the TPS.

dollars to donuts, hooking up the VRG Scantool, you'll see your IAC duty cycle be all jacked up.

tris91ricer · Post by **tris91ricer** » Mon May 02, 2005 7:06 pm

Damnit, mine's been known to do that as well, and I'm really holding off on buying an IAC, I DON'T WANNA! They be expensive.

I also need to run the vrg scan tool on my car, just once, to say i did it.

Flip_x · Post by **Flip_x** » Mon May 02, 2005 9:40 pm

if it is the iac there is a turbo legacy in the junkyard i can yank it off of.. but with the iac vacume line i pluged it up and its the same idle, i'll figure it out by today i hope my uncle he works for the city bus repair. and he use to have his own shop. so wish me luck lol..

free5ty1e · Post by **free5ty1e** » Tue May 03, 2005 12:52 pm

I've also run with no hood scoop diverter (and a WRX hood scoop) for while now, no IAC or TPS problems here [knock on wood]. And I'm in a relatively rainy area. [/knock on wood]

dzx · Post by **dzx** » Tue May 03, 2005 3:33 pm

I had the hood scoop diverter and chimney removed as soon as i got the car, driven through car washes and really heavy rains and haven't had a problem.

Flip_x · Post by **Flip_x** » Wed May 04, 2005 3:40 am

it works again. the butter fly was stuck so we are gonna fix it with some kind of floater or something that lets it set back in place. thanks

BAC5.2 · Post by **BAC5.2** » Wed May 04, 2005 3:45 am

I get knock sensor codes in the rain

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very high idle

very high idle