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Old 04-29-2013, 03:26 PM   #1
Frank19
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Default 2005 sti Idle, Stall problems and Acceleration

Hey guy's this is my first post on here. Just have almost a full month with my STi and i Love it its the best car ever and plan on keeping mine for the longest possible.
So onto the problem

Just today on my way to school, I left my house perfectly fine, then when on the highway in 6th gear I was going to pass a slower car and the acceleration on it felt weird, like if something was holding the car back. i downshifted to 5th still kind of did it then when i was in 4th the power was normal. and I was not using my AC.

Then when arriving to my school, I stopped at a crosswalk to let people walk and my car idle fell to 0 and bounced up to normal then came down and car turned off. I then turned it back on and it started up back normal. then when i parked I stayed inside for a min and the idle kept bouncing and the car turned off again.

Has anyone had this issue before?

Mods on the car are: TurboX/s Bov, Aftermarket Catback, and CAI.

and No check engine lights, or blinking cruise control lights showed up.

can someone please help, and/or give me some idea's/thoughts to what you think might be the problem.

Thanks
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Old 04-29-2013, 03:29 PM   #2
alecb
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Are you tuned for your mods?
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Old 04-29-2013, 04:02 PM   #3
Cards2323
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It wont stll because of a lack of tune, check the BOV, it bet its sticking open.
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Old 04-29-2013, 05:57 PM   #4
Frank19
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no, im not tuned. but its been running 100% fine. Our mechanic checked it the first week i got it and he said i was fine. he just suggested the stock bpv and a carb legal intake for smog regulations to not have problems.

ill check the Bov forsure. And also what i got yesterday is a Chirp coming from the engine bay. Looked up here on the forums and said its from the AC. Could that belt needing to be tightened be part of the problem aswell?
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Old 04-29-2013, 06:45 PM   #5
Frank19
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just got home finally and on way here cruise control light started flashing
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Old 04-29-2013, 06:53 PM   #6
ImprezaWrx9
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Get rid of the bov and cai unless you're getting a tune.

Could it be this?

http://forums.nasioc.com/forums/showthread.php?t=781242
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Old 04-29-2013, 07:01 PM   #7
DansSpace
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Vacuum leak?
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Old 04-29-2013, 07:40 PM   #8
Frank19
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No vacuum leak. main thing i know forsure is my Bov causing the idle. and i think the Maf sensor is throwing the Cursie control to flash and CEL to turn on.
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Old 04-29-2013, 08:13 PM   #9
Ruhh-Roh
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Edit: wait, at what point did you start to have a CEL? At first you didn't and now ya do.
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Old 04-29-2013, 09:03 PM   #10
Frank19
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yess. at first it their was nothing going to my college. estimated 25 miles away highway driving. 3/4 way back the cruise control light started flashing. with the CEL. Idle is really bad now. is prbbly at 50 not even 100 and boggles/jitters and slowly pull to about 5-600.
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Old 04-29-2013, 09:08 PM   #11
rdowner22
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idk why no one has torn you a new one yet.... you need a tune for your cai. read Unabombers Manifesto. Clean your MAF as well.
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Old 04-29-2013, 10:43 PM   #12
Brent22
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Quote:
Originally Posted by rdowner22 View Post
idk why no one has torn you a new one yet.... you need a tune for your cai. read Unabombers Manifesto. Clean your MAF as well.
I think we're getting fatigued.
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Old 04-30-2013, 03:56 AM   #13
Frank19
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Will be replacing the intake with stock, aswell as the bov with a stock bpv. Maf was checked and it was fine. Also was checked for vacuum leaks and nothing. their was somthing electrical going on according to my mechanic. its running fine now how it used to be. but forsure taking the cai. the 1st owner put it just to put it. and Ive read in the forums that the stock airbox is good till 400hp.
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Old 04-30-2013, 03:57 AM   #14
Frank19
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thanks to everyone for the inputs.
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Old 04-30-2013, 06:17 AM   #15
chapstien
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Did you get the code pulled?
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Old 04-30-2013, 01:36 PM   #16
Frank19
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Not yet, but im not driving it for safety, dont want to cause any damage to it. not risking it. it should be getting checked today at a shop.
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Old 04-30-2013, 01:45 PM   #17
Scanyland
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Quote:
Originally Posted by Frank19 View Post
Not yet, but im not driving it for safety, dont want to cause any damage to it. not risking it. it should be getting checked today at a shop.
props to you for doing this, I can't tell you how many people ive seen continue to drive the car with an unknown problem that ends up making things worse.
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Old 04-30-2013, 01:47 PM   #18
amalgrover
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First let me just say that you are on the right path by not choosing to drive it until it is fixed, swapping to an intake that you are actually tuned for, and getting rid of the turboxs bov. The turboxs valves are notorious for leaking, and a cold air intake without a tune can cause alot of issues if it flows more than the ecu can correct.

With that said...

Quote:
Originally Posted by DansSpace View Post
Vacuum leak?

Quote:
Originally Posted by Frank19 View Post
No vacuum leak. main thing i know forsure is my Bov causing the idle. and i think the Maf sensor is throwing the Cursie control to flash and CEL to turn on.
...if your valve is leaking and you aren't in boost, what does that then become?

...just trying to get you to think about what you said for a second...
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Old 04-30-2013, 02:18 PM   #19
Frank19
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Thanks guys. and yea i rather wait a week to find the problem and then fix it. then to drive it the rest of the week and blow it up.
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Old 04-30-2013, 02:21 PM   #20
Frank19
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Quote:
Originally Posted by amalgrover View Post
First let me just say that you are on the right path by not choosing to drive it until it is fixed, swapping to an intake that you are actually tuned for, and getting rid of the turboxs bov. The turboxs valves are notorious for leaking, and a cold air intake without a tune can cause alot of issues if it flows more than the ecu can correct.

With that said...

...if your valve is leaking and you aren't in boost, what does that then become?

...just trying to get you to think about what you said for a second...
Hmm... true... idk really. i just took it to my mechanics house yesterday and he tried his scanner but it didnt pick up anything. so today at the shop where he works he was going to try it their. just need to take him the car. Im being patient because he's busy doing other things but he told me alrrady that if he calls me i can take it he'll use the scanner, pull of the code. and then go from their. but yea he already told me to get rid of the cai. that one being first. and stock bpv after.
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Old 04-30-2013, 02:24 PM   #21
berge56
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When you checked the maf did you clean it with MAF cleaner? A lot of times they look fine but are really dirty.

Props for not driving the car with the issue.
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Old 04-30-2013, 02:25 PM   #22
Frank19
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My mechanic also checked for a vacuum leak with if i remmbr intake cleaner?( am i right) it was some type of spray and he told me i didnt have one. he just believes its the cai because of more airflow throwing off the ecu, and the iddle problem from the bov.
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Old 04-30-2013, 02:27 PM   #23
Frank19
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Quote:
Originally Posted by berge56 View Post
When you checked the maf did you clean it with MAF cleaner? A lot of times they look fine but are really dirty.

Props for not driving the car with the issue.
No i did not. im not a mechanic. and the car is just here at home. And to me i rather be patient and have a professional do everything. i dont like to take small risks of me doing somthing stupid and then even having to replace the MAF after. i have no problem in waiting.
but i will tell my mechanic to do that. thanks.
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Old 04-30-2013, 03:08 PM   #24
Frank19
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hey guys, even if the Bov is 50/50. its the hybrid turbo Xs. can that still be causing the iddle problem? or only fully atomspheric bov cause that.
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Old 04-30-2013, 04:30 PM   #25
Anubis80
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Quote:
Originally Posted by Scanyland View Post
props to you for doing this, I can't tell you how many people ive seen continue to drive the car with an unknown problem that ends up making things worse.
yeah QFT right there
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