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Old 07-31-2009, 05:41 PM   #276
GDAryder
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heres what i found

P1312: Exhaust temperature sensor malfunction.

nothing at all to do with my idle. hmmm....

started it up and the idle still stuck a bit......



ill clean the throttle body tonight, start her up drive around for a few, see what that does. i guarantee my TB is gunked to all hell since i never cleaned it and since the car sat in serious humidity for 2 weeks.

ill keep you folks posted!
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Old 07-31-2009, 05:51 PM   #277
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Quote:
Originally Posted by oburgslim View Post
^^Well i got the new gasket and went with the alky and q-tip method..installed everything..reset the ecu,turn to ON postion,then off(repeat 3times)..started the car and let it run for 10mins. CEL popped on with the 1507 code. cleared the cel and started the car again,idle still 1500-2000..went for a drive under boost and car sounds fine except for the high idle when i stop.
So i think im going to have to shell out $300 for a new IAC.

the question is now..when i get the new IAC is it going to be the part that i removed to replace the gasket or am i going to have to mess with the TB?

Any suggestions for me to DIY.

Thank you.
same thing happened to me today. and mind you, i had already replaced the IACV gasket, and adjusted the CC cable which cured the first idle problem, but after sitting for two weeks i find this mess going on now. checked my CEL, no 1507, but 1312. weird. im gonna clean my TB n see if that works. otherwise i guess a new sensor is gonna be bought instead of the damn 750cc's i was hoping to buy..........

damn subarus........
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Old 08-01-2009, 01:57 PM   #278
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tore some stuff apart today, found a nice slice in one of my IC pipes that i cleaned and sealed with duct tape. thinking this was the problem, i put it all back together to see if it would fix the issue. and of course, it didnt. two more codes popped up:

P0102 - MAF low input

P0113 - Intake Air temperature circuit High input

either one or two things need to be replaced from what im assuming: i need a new MAF, or my IACV is f_<ked. each costing alot more than i wanted to spend at the moment. this royally pisses me off. i let the car sit for two weeks, then come home to this.


FML
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Old 08-01-2009, 06:37 PM   #279
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alas...........now the idle seemed to have corrected itself (after unplugging some connectors and seeing if the car would die, then clearing more codes for the IACV and MAF and the boost leak which i had fixed in my garage earlier today lmao), just drove home and now it seems to be back to normal (for now lol).

ill keep folks updated and feel free to shoot a PM if anybody ever goes through this same headache
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Old 08-04-2009, 08:55 AM   #280
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If you're still having problems after cleaning the IACV as best you can, then take it apart by removing the stepper motor as shown in this thread:
http://forums.nasioc.com/forums/show...highlight=iacv

You can clean it out a lot more and make sure it's spinning freely that way.

I would advise against using brake cleaner to clean it out too. That's pretty corrosive stuff. WD-40 and/or throttle body cleaner should be good enough.
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Old 08-04-2009, 12:43 PM   #281
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^ thanks. subscribed. that will come in handy.
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Old 08-04-2009, 01:35 PM   #282
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Quote:
Originally Posted by Metallrulz View Post
If you're still having problems after cleaning the IACV as best you can, then take it apart by removing the stepper motor as shown in this thread:
http://forums.nasioc.com/forums/show...highlight=iacv

You can clean it out a lot more and make sure it's spinning freely that way.

I would advise against using brake cleaner to clean it out too. That's pretty corrosive stuff. WD-40 and/or throttle body cleaner should be good enough.
I'm having good luck with my IACV since lubing it with plain old 3 in 1 lubricant. Car seems to be running very smoothly. Oh and I always pull the whole setup apart when I clean it. Ordering the special torx bits were a PITA but well worth it.
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Old 08-04-2009, 01:52 PM   #283
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the issues i listed that i was having i assume were only because the car sat at my unit for two weeks, with the apparent slice open to the elements open to the environment. it did rain ALOT while i was gone. and the funny idle is usually prone to some sort of leak. it just took unplugging some connectors for the "correct" codes to eventually show themselves and for the ecu to finally "ok" itself.

ill know what to do next time thats for sure. i remember the last high idle incident i had where i was crossing the Geo. W. bridge going into NYC about 2 months ago, with bumper-to-bumper traffic the ENTIRE way over the bridge. thank god the Major Deegan Expy was pretty open that day. frickin throttle stuck as high as 4k that day.

but that'll never happen again ;-)
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Old 08-05-2009, 05:53 PM   #284
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I just cleaned mine. I had to use impact screw driver. I just finished cleaning the IACV and the MAF. They are drying off right now. I used the MAF cleaner, and i kinda used it on IACV to. i hope i didnt mess anything up. I cleand the IACV as clean as possible, but still doesnt look anything close to clean as in the pics in first post.
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Old 08-06-2009, 03:57 AM   #285
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Originally Posted by 02WRX<3 View Post
I just cleaned mine. I had to use impact screw driver. I just finished cleaning the IACV and the MAF. They are drying off right now. I used the MAF cleaner, and i kinda used it on IACV to. i hope i didnt mess anything up. I cleand the IACV as clean as possible, but still doesnt look anything close to clean as in the pics in first post.

let us know how it works out for you once you're all done. loosen that CC cable if you havent already, that lil sumbitch about 7 out of 10 times is the culprit for sticky idles in hot traffic.
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Old 08-27-2009, 12:10 AM   #286
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bump for an awesome thread my car sat for a year while i put a new motor, trans, etc. in it. started it and threw a p1507 and idles high, stumbling. good thing i found this before i spent 300 bucks on a new IACV. def gonna try taking it all the way apart and cleaning it. the shop i talked to said it was probably just a vacuum or intake leak somewhere but i cant find any. hope this works
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Old 09-05-2009, 03:34 PM   #287
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I don't understand I'm hearing two different things on this thread. I got an 05 STi, drive by wire with no IAC. I was reading one of the posts and somebody asked will this work for my 05 STi and the next guy said I don't see why not. What gives here?

I got a stock STi, 76,000 miles on it with a stuttering at idle, no codes. I heard somebody say that when the cooling fans turn on it's normal to stutter and stumble. But in my case it stumbles and stalls after driving it for a little, never at first start up. I have to drive it and warm it up for a little and it starts stalling at an idle. Like at lights or stop signs. And it's constant, it's every time, but not always instant. It gets worse and worse the more I drive it. What throws me off is if some sensor is dirty, wouldn't it happen all the time? And the funny part is it looks like I can't drive it. Here's this kid with a ******* STi and he can't drive it. Please help. Thanks.
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Old 09-05-2009, 03:43 PM   #288
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Originally Posted by SubaruSVXCrazy View Post
I don't understand I'm hearing two different things on this thread. I got an 05 STi, drive by wire with no IAC. I was reading one of the posts and somebody asked will this work for my 05 STi and the next guy said I don't see why not. What gives here?

I got a stock STi, 76,000 miles on it with a stuttering at idle, no codes. I heard somebody say that when the cooling fans turn on it's normal to stutter and stumble. But in my case it stumbles and stalls after driving it for a little, never at first start up. I have to drive it and warm it up for a little and it starts stalling at an idle. Like at lights or stop signs. And it's constant, it's every time, but not always instant. It gets worse and worse the more I drive it. What throws me off is if some sensor is dirty, wouldn't it happen all the time? And the funny part is it looks like I can't drive it. Here's this kid with a ******* STi and he can't drive it. Please help. Thanks.
dude i wish i could help ya. i didnt think this happened at all with STi's. that is weird tho, there has to be some type of sensor involved with that problem. ask around some more, go to the dealer, ask them, hit up a few other shops, see what folks tell you.

did you buy your car with 76k miles? idk how u drove it for that long bone stock lol
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Old 09-05-2009, 04:36 PM   #289
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Quote:
Originally Posted by GDAryder View Post
dude i wish i could help ya. i didnt think this happened at all with STi's. that is weird tho, there has to be some type of sensor involved with that problem. ask around some more, go to the dealer, ask them, hit up a few other shops, see what folks tell you.

did you buy your car with 76k miles? idk how u drove it for that long bone stock lol
Thanks for trying to help. I just bought it like 2 months ago. I got it with 75 in change. Currently in college with a college bank account. I had searched my symptoms and this thread came up and sounded like it was the problem until I learned it had a drive by wire w/o IAC. I guess for right now I'll start its own thread. I appreciate you trying to help.
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Old 09-05-2009, 04:39 PM   #290
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Quote:
Originally Posted by SubaruSVXCrazy View Post
I don't understand I'm hearing two different things on this thread. I got an 05 STi, drive by wire with no IAC. I was reading one of the posts and somebody asked will this work for my 05 STi and the next guy said I don't see why not. What gives here?

I got a stock STi, 76,000 miles on it with a stuttering at idle, no codes. I heard somebody say that when the cooling fans turn on it's normal to stutter and stumble. But in my case it stumbles and stalls after driving it for a little, never at first start up. I have to drive it and warm it up for a little and it starts stalling at an idle. Like at lights or stop signs. And it's constant, it's every time, but not always instant. It gets worse and worse the more I drive it. What throws me off is if some sensor is dirty, wouldn't it happen all the time? And the funny part is it looks like I can't drive it. Here's this kid with a ******* STi and he can't drive it. Please help. Thanks.
Look at this picture.

Quote:
Originally Posted by scooterforever View Post

Now go look at your throttle body. if you don't see it (which you wont because U.S. STi's don't have one) then you don't have one and your problem lies elsewhere.
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Old 09-10-2009, 06:36 PM   #291
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Yea obviously. How bout the throttle body position sensor? Any DIY's on how to clean that? Cuz it's still happening.
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Old 09-10-2009, 11:51 PM   #292
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I'm pretty sure the throttle body is always in the same position.

IDK what to clean or what needs to be cleaned on the Throttle Position Sensor. Pull it off and see what it looks like. I have an old WRX throttle body with the TPS on there, maybe Ill pull it off and see.
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Old 09-18-2009, 09:08 PM   #293
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97k... NEW IACV w/gasket .. def worth it for 235 .. seems a lil stronger too..

45k.. did the fix w/gasket, and worked great for 2 yrs!! props to this thread!! and im still usin the stock screws that were in place!!
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Old 09-27-2009, 07:06 PM   #294
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Thanks for your help guys. Believe it or not it was my plugs. They were never changed with 77,000 on them. They were the stock NGK Laser Iridium (For the STi the NGK number was ILFR6B). After I changed the plugs it has been running perfectly for like 2 weeks now. Plugs should be the first thing you should check for. I hope this can help somebody one day. Thanks for your help guys.
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Old 10-12-2009, 05:45 PM   #295
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Default Cleaning And Reattaching The IACV - Car won't start now!!

Any suggestion?

I followed the directions to the "T" for the cleaning and reattaching of the IAVC then primed the fuel pump as Unabomber suggested and now my car won't start!!! Any suggestions?
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Old 11-11-2009, 10:41 PM   #296
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Anyone ever experienced this issue after changing over to TGV deletes? My car idles fine when you first crank it; however, it craps out and has a rough idle after the engine warms up. It first threw a code and then after my mechanic cleaned it out, the code went away but it still idles.. Any suggestions would help. Thanks
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Old 11-11-2009, 11:57 PM   #297
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Originally Posted by JWDWRX View Post
Anyone ever experienced this issue after changing over to TGV deletes? My car idles fine when you first crank it; however, it craps out and has a rough idle after the engine warms up. It first threw a code and then after my mechanic cleaned it out, the code went away but it still idles.. Any suggestions would help. Thanks
Uh, yea, did you not get your car tuned for the TGV deletes? If not, that's why you're having this problem. It will only get worse with colder weather. Get it to a tuner ASAP.
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Old 11-12-2009, 07:06 AM   #298
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Originally Posted by 05wrx09 View Post
Uh, yea, did you not get your car tuned for the TGV deletes? If not, that's why you're having this problem. It will only get worse with colder weather. Get it to a tuner ASAP.

He tuned it; however, it did not get any better.
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Old 11-12-2009, 12:18 PM   #299
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He tuned it; however, it did not get any better.
I would go back and tell your tuner about your problem. Maybe he can adjust your warm up idle or something.
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Old 11-16-2009, 09:01 PM   #300
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Ok, I am thinking about doing this to fix some idle issues I have, but before I order the gasket do these symptoms sound like a dirty IACV?

The car typically idles fine but sometimes when I roll to a stop sign or traffic light, the rpms drop way down below 500 and the car sounds like its about to stall. This lasts for about a few seconds and then it suddenly restores to perfect idle, it never stalls.

Also, very rarely, when I start the car cold or warm it will start and stall. I can try over and over and it will not stay running, but if I put even the slightest bit of throttle while its starting it will start fine.

I don't have any issues with idle being too high and the car never stalls while driving.

What do you guys think?
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