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Old 11-19-2012, 11:17 AM   #1
BrendanTheGreat408
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Default What the F%$* just happened???

I was just driving my car (2011 wrx, catless dp, perrin exhaust, forge bpv, perrin tmic with torqued performance stage 2 tune) and went to pass someone on the freeway at about 60-70% throttle after building boost for a matter of a few milliseconds my car stop pulling and slowed down and i heard a banging sound (i felt as if my tmic had came unbolted and smacked against my hood to try and explain the sound) then milliseconds later my CEl light came on and the car began to pull again but of course i let off completely. The CEL remained on for the rest of my 5 mile drive. I got to work and popped the hood and everything looked and sounded fine so i turned off the car and turned it back on again with the CEL. Any idea what the *&^$ just happened?

Note* I just installed the TMIC yesterday and had sent in two 3rd gear pulls to Eric who then returned with a new map (still stage 2 tuned).
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Old 11-19-2012, 11:22 AM   #2
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First thing I'd do is identify what code is triggering the CEL.

Get a lift from someone at your work to the local parts store and pick up a cheap reader?
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Old 11-19-2012, 11:31 AM   #3
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#1 is to check the CEL.

My guess is either a boost leak or an overboost code.

Did you remove the rubber end caps from both ends of the throttle body to TMIC hose? If not, I would definitely do that (both ends).
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Old 11-19-2012, 11:36 AM   #4
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Quote:
Originally Posted by xluben View Post
#1 is to check the CEL.

My guess is either a boost leak or an overboost code.

Did you remove the rubber end caps from both ends of the throttle body to TMIC hose? If not, I would definitely do that (both ends).
Yeah, my bet from what has been said is the p0244. Scared the living **** out of me the first time it happened.
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Old 11-19-2012, 12:10 PM   #5
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Quote:
Originally Posted by xluben View Post
#1 is to check the CEL.

My guess is either a boost leak or an overboost code.

Did you remove the rubber end caps from both ends of the throttle body to TMIC hose? If not, I would definitely do that (both ends).
Rubber throttle body thing? Idk i just took off the oem tmic and bolted up the front one.

Quote:
Originally Posted by swpshgnwgn View Post
Yeah, my bet from what has been said is the p0244. Scared the living **** out of me the first time it happened.
its scarred my ****less right now lol,

I think it might be an over boost code, i actually had the accessport running at the time and it was showing boost, after it happened i noticed i boosted 21psi when it only should have been 19
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Old 11-19-2012, 12:12 PM   #6
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Most likely thing would be you over boosted.
Or you might have popped the TB to intercooler hose.

Or both.
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Old 11-19-2012, 12:54 PM   #7
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If you have an accessport then check the code!
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Old 11-19-2012, 01:00 PM   #8
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Quote:
Originally Posted by swpshgnwgn View Post
Yeah, my bet from what has been said is the p0244. Scared the living **** out of me the first time it happened.
haha this!! I'm guessing this is it too..After going to a hybrid boost setup and ewg I hit fuel cut on my way home from tuning (high gear boosting) Over boosted thought I blew the motor lol
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Old 11-19-2012, 01:05 PM   #9
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Could have been a intercooler hose popping off, but you would be able to notice that now if that were the case. So it was more likely a big backfire from improper tune/timing. If that is the case..... id be asking for my money back and finding a new tuner.
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Old 11-19-2012, 01:57 PM   #10
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Originally Posted by UK-Wagon View Post
Could have been a intercooler hose popping off, but you would be able to notice that now if that were the case. So it was more likely a big backfire from improper tune/timing. If that is the case..... id be asking for my money back and finding a new tuner.

Your reading comprehension score must have been on the low side. He has an OTS tune from TP. That map did not cause a big backfire due to poor tuning or timing. Most likely he hit boost cut or popped the TB hose.
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Old 11-19-2012, 02:41 PM   #11
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Quote:
Originally Posted by UK-Wagon View Post
Could have been a intercooler hose popping off, but you would be able to notice that now if that were the case. So it was more likely a big backfire from improper tune/timing. If that is the case..... id be asking for my money back and finding a new tuner.
If his car backfired, he would not be driving home, as he would have destroyed many things. if it was after fire(which I believe is what you meant) then it would have been an exhaust pop(not under the hood) and would not throw a cell, as that happens post cat, where there are no more alarm sensors.

Also, over boost would through the cell, but not make the noise OP has described.

99% sure you will find, as others have suggested, that your TB hose came off. The factory ones are notorious for doing this, even with stock TMIC. Either take off the glued on end pieces, or order a replacement like the AVO.
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Old 11-19-2012, 04:44 PM   #12
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After doing some research and reading the code it was P0244 aka the over boost code. I checked the hoses and they were all still mounted. it looks like the engine over boosted and shutdown to prevent damage.
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Old 11-19-2012, 09:36 PM   #13
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Quote:
Originally Posted by Tripintaz View Post
Your reading comprehension score must have been on the low side. He has an OTS tune from TP. That map did not cause a big backfire due to poor tuning or timing. Most likely he hit boost cut or popped the TB hose.
OTS?
boost cut?

sure

Quote:
Originally Posted by dsmtweaker View Post
If his car backfired, he would not be driving home, as he would have destroyed many things. if it was after fire(which I believe is what you meant) then it would have been an exhaust pop(not under the hood) and would not throw a cell, as that happens post cat, where there are no more alarm sensors.
No, I meant backfire.... Ive herd and seen it happen on subarus. Most common on N/A subarus or EJ20 WRX's with TGV deletes and no tune for them, it will happen. If small enough it wont hurt, there are many other ways to get back fires on EFI engines. OP has AVCS and if the timing was not properly adjusted for many things that I really dont want to get into, it could have done that in the higher RPM that he had this happen at. Yes it would have to be pretty damn far off, but being it was E-tuned..... you never know what is going on. Remember, OP says "the car started slowing down then POP", all while at 60%-70% throttle. Sounds timing related to me. Further, op never said anything about the car running like $hit after it happened. Not having a intake related hose connected will cause engine stall, poor idle, and Zero boost. Where did op state any of that additional info!?!

OP, if youre car boosted fine after this happened, then it was something else. But you never stated it didnt boost after or didnt idle correctly. If you blew off a hose the car would have almost shut off and would be falling on its face when you gave it throttle after it happened. But you have yet to say this also occurred. This is WHY im left with saying it may have been a serious backfire and you may have been lucky it didnt cause major engine damage.

Last edited by UK-Wagon; 11-19-2012 at 09:51 PM.
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Old 11-19-2012, 11:36 PM   #14
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What gear were you in when you went to pass? If you were mashing on it in 5th along with the catless DP...I would also say over boosted.
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Old 11-20-2012, 12:07 AM   #15
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I think UK-Wagon is way off base here. You're better off talking to Eric about the issue. He'll be a lot more capable of diagnosing and resolving it.
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Old 11-20-2012, 08:21 AM   #16
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It was a simple over-boost. It sounds like you attempted to go WOT in too high of a gear (5th?) where you had a high load situation. Since you didn't mention you had an EWG I'm assuming you dont and your IWG was unable to compensate for the amount of air the car was flowing. This caused the turbo to pressurize an excess amount of air. The MAP sensors saw you reached a certain defined limit and cut the fuel in order to stop the over boosting.

You learned a lesson; don't go WOT in high gears, always down shift. You can also inform eric of this happening and he can likely adjust the WGDC and TD tables to help prevent this (possibly even raise the limit since 21 psi isn't all that high). It's likely he wuill tell you to stay off WOT when in a high gear situation.
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Old 11-20-2012, 08:56 AM   #17
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The pop was fuel cut (scary experience, i know) from..... you all guessed it. Overboosting
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Old 11-20-2012, 09:17 AM   #18
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Quote:
Originally Posted by UK-Wagon View Post
OTS?
boost cut?

sure


Go back and read the post right before your heavenly words. OP posted already and said he checked the codes and it was the overboost CEL.

So looks like I was right again. .... MR GURU
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Old 11-20-2012, 09:19 AM   #19
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Originally Posted by xluben View Post
I think UK-Wagon is way off base here. You're better off talking to Eric about the issue. He'll be a lot more capable of diagnosing and resolving it.

He has been way off base on multiple threads lately. Maybe hes thinking at a far too advanced level...or something...
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Old 11-20-2012, 09:22 AM   #20
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Another +1 for P0244 Wastegate control solenoid valve malfunction (Over Boost). Just google that CEL code and you'll see other posting very similar details.
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Old 11-20-2012, 09:37 AM   #21
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Same thing happens in my 2010 with similar mods, P2044. Mine will do it in 4th around 5k rpms.

Is there a common fix for this?
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Old 11-20-2012, 09:48 AM   #22
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Originally Posted by Ignored281 View Post
Same thing happens in my 2010 with similar mods, P2044. Mine will do it in 4th around 5k rpms.

Is there a common fix for this?

External wastegate or porting the stock wastegate helps.
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Old 11-20-2012, 10:19 AM   #23
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thanks...
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Old 11-20-2012, 10:38 AM   #24
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Originally Posted by Ignored281 View Post
Same thing happens in my 2010 with similar mods, P2044. Mine will do it in 4th around 5k rpms.

Is there a common fix for this?
Putting the stock intake back on will help. But the most common fix is an EWG.
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Old 11-20-2012, 10:47 AM   #25
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Quote:
Originally Posted by Tripintaz View Post
Putting the stock intake back on will help. But the most common fix is an EWG.


An EWG is the only fix for a true boost creep/spike. If its poor tuning or the stock bcs issue those can be fixed with well proper tuning and a 3-port solenoid. Porting the IWG can help, but often you will still experience creep if your running an excess of 21 psi (as me how I know). Sounds to me like the OP has a case of unfinished tune. He put a new top mount on, the tuner turned up the boost a bit (since he can now, no more crappy plastic end tanks) and hasn't fully adjusted the WGDC or TD tables to properly achieve targeted boost.
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