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11-19-2012, 11:17 AM | #1 |
Scooby Specialist
Member#: 271207
Join Date: Jan 2011
Chapter/Region:
BAIC
Location: Morgan Hill, CA
Vehicle:2011 WRX SWP |
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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11-19-2012, 11:22 AM | #2 |
Scooby Specialist
Member#: 151739
Join Date: Jun 2007
Chapter/Region:
NESIC
Location: Lakeville, MA
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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? |
11-19-2012, 11:31 AM | #3 |
Scooby Guru
Member#: 261612
Join Date: Oct 2010
Location: Minneapolis, MN
Vehicle:2002 WRX - 750WHP 9.5s @ 150mph |
#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). |
11-19-2012, 11:36 AM | #4 |
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South East
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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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11-19-2012, 12:10 PM | #5 | ||
Scooby Specialist
Member#: 271207
Join Date: Jan 2011
Chapter/Region:
BAIC
Location: Morgan Hill, CA
Vehicle:2011 WRX SWP |
Quote:
Quote:
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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11-19-2012, 12:12 PM | #6 |
Scooby Specialist
Member#: 245218
Join Date: Apr 2010
Chapter/Region:
South East
Location: FL
Vehicle:2013 STI Limited |
Most likely thing would be you over boosted.
Or you might have popped the TB to intercooler hose. Or both. |
11-19-2012, 12:54 PM | #7 |
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If you have an accessport then check the code!
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11-19-2012, 01:00 PM | #8 |
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MWSOC
Location: Green Bay, WI
Vehicle:2004 WRB STi |
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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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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11-19-2012, 01:57 PM | #10 | |
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Join Date: Apr 2010
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Quote:
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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11-19-2012, 02:41 PM | #11 | |
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Quote:
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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11-19-2012, 04:44 PM | #12 |
Scooby Specialist
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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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11-19-2012, 09:36 PM | #13 | ||
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Join Date: Dec 2009
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Vehicle:555 XTi 1 AW & 1 CGM |
Quote:
boost cut? sure Quote:
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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11-19-2012, 11:36 PM | #14 |
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Vehicle:2011 WRX Sedan DGM Stg1+ SF |
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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11-20-2012, 12:07 AM | #15 |
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Vehicle:2002 WRX - 750WHP 9.5s @ 150mph |
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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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. |
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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11-20-2012, 09:17 AM | #18 |
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11-20-2012, 09:19 AM | #19 | |
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Join Date: Apr 2010
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Quote:
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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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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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? |
11-20-2012, 09:48 AM | #22 |
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11-20-2012, 10:19 AM | #23 |
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thanks...
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11-20-2012, 10:38 AM | #24 |
Scooby Specialist
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Join Date: Apr 2010
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11-20-2012, 10:47 AM | #25 | |
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Quote:
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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