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12-14-2016, 08:25 PM | #1 |
Scooby Specialist
Member#: 37003
Join Date: May 2003
Chapter/Region:
MWSOC
Location: Twin Cities
Vehicle:2015 WRX DGM |
No boost over 14psi
I'm going to attempt to make this long story short, so bare with me
I've been running the following setup for a little over a year tuned at 21psi with no issues: 2015 WRX Catted TBE Grimmspeed EBCS TMIC & Chargepipe When the Cobb FF kit came out, I decided to pull the trigger and order the kit and tune. Once I got the kit, I decided to do TGV and EGR deletes while I was in there, so my mods are as follows: 2015 WRX Catted TBE Grimmspeed EBCS TMIC + Chargepipe TGV & EGR Delete Cobb FF Kit Started the process of e-tuning and instantly thought the car felt laggy and had no power, but I just wrote it off as the tuner taking his time through the first couple maps, until we got the 5th revision and I was told to check for boost leaks as the car wasn't making boost. Great! So I brought my car to a local shop and had them do a boost leak test and they came up with nothing. I personally watched them perform the test and the system held positive pressure, no leaks. I then took the car back to my mechanic to test the EBCS per Grimmspeeds advice and sure enough, the BCS was bad. GS was kind enough to give me a replacement free of charge. Got the new controller installed and the car instantly felt like it had more power and response, so I did a short pull and the car will still not go past 14psi. I'm at a loss right now. Mechanic says no leak but my car wont boost over 14 psi. I even tested the new BCS myself and it tests out good. Anybody have ANY ideas? I'm ready to roll it in the street and set it on fire |
12-14-2016, 08:34 PM | #2 |
Scooby Newbie
Member#: 430568
Join Date: Sep 2015
Chapter/Region:
NESIC
Location: Buffalo NY
Vehicle:2015 Wrx Base Ice Silver |
I've read below a certain temperature the boost is lowered, but it shouldn't happen with a pro tune. Mines pro tuned and I live in buffalo but I haven't honestly done a pull in the winter with snow tires so I can't verify.
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12-14-2016, 09:29 PM | #3 |
Scooby Newbie
Member#: 459773
Join Date: Dec 2016
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I think I have a similar issue. I have TBE and CAI with Cobb OTS tune. I should be hitting 20~ Psi but only get around 14... Did you have a Cobb tune prior to gettiing the FF setup?
My tuner is inexperienced with Cobb and i believe that the issue is that Cobb required the 'Secondary restrictor pill' to be removed. Cobb even provides instructions. I have not had a chance to attempt it but I know they do this on Evos. This is a link to the guide: https://cdn.shopify.com/s/files/1/08...ll-removal.pdf Hope this helps |
12-15-2016, 10:10 PM | #4 | |
Scooby Newbie
Member#: 456662
Join Date: Oct 2016
Location: Lakewood, Colorado
Vehicle:2016 WRX |
Quote:
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12-14-2016, 09:32 PM | #5 |
Scooby Specialist
Member#: 37003
Join Date: May 2003
Chapter/Region:
MWSOC
Location: Twin Cities
Vehicle:2015 WRX DGM |
I did have a pro-tune prior to installing the FF kit with no issues. The tuner I'm using now has tuned hundreds of Subaru's so I don't think the tune is the issue.
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12-14-2016, 10:07 PM | #6 |
Scooby Specialist
Member#: 166470
Join Date: Dec 2007
Vehicle:2015 WRX |
May be because you were tuned for a bad boost controller. Now that you have a new unit in place, send the tunner a log and have him update for a correctly functioning unit. This is my educated guess.
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12-14-2016, 10:09 PM | #7 |
Scooby Specialist
Member#: 37003
Join Date: May 2003
Chapter/Region:
MWSOC
Location: Twin Cities
Vehicle:2015 WRX DGM |
Yep I did that just waiting to hear back from the tuner but I'm preparing for him to say it's a mechanical issues.
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12-15-2016, 02:02 AM | #8 | |
Scooby Newbie
Member#: 130185
Join Date: Oct 2006
Vehicle:2016 WRX Metallic Grey |
Quote:
I think you should send new logs, to get the new revision ...and upload it. Btw, try re-uploading the last tune ... wild guess |
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12-15-2016, 11:06 AM | #9 |
Scooby Newbie
Member#: 394353
Join Date: Jun 2014
Chapter/Region:
MWSOC
Location: Yankton, SD
Vehicle:2015 WRX ISM |
Ive been etuned 3 times by 2 different tuners, neither of the tuners have disabled the compensation tables (these are what limit boost in winter since the air is denser). 1st tune was catless dp only (Bren), 2nd tune was catless turboback (Bren), 3rd was turboback, intake, tgvd, egrd, chargepipe, and ebcs (Torqued Performance). They seem to have modified them to not be as restrictive as original, but they still limit boost (stock it would limit to about 11-12psi, all three of my tunes would hit close to 13-14psi in 10-35 degree weather. During summer I hit about 18psi on 91 oct.
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12-15-2016, 11:40 AM | #10 |
Scooby Specialist
Member#: 395882
Join Date: Jul 2014
Chapter/Region:
MWSOC
Location: GR, Michigan
Vehicle:2016 WRX DGM |
Someone get this man a Nobel prize, or at least TIME man of the year.
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12-15-2016, 12:39 AM | #11 |
Scooby Newbie
Member#: 325769
Join Date: Jul 2012
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Same thing is happening to me. I drop like 5 psi in winter and as soon as it gets warmer the boost comes back. I am also pro tuned.
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12-15-2016, 11:44 AM | #12 | |
Scooby Newbie
Member#: 429404
Join Date: Sep 2015
Chapter/Region:
MWSOC
Location: Minneapolis, MN
Vehicle:2016 WRX Lapis Blue Pearl |
Quote:
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12-15-2016, 12:28 PM | #13 |
Scooby Specialist
Member#: 391748
Join Date: May 2014
Chapter/Region:
NESIC
Location: The Shire
Vehicle:2015 WRX CWP (sold) 2019 STi CWP |
Why not post a log comparing target boost and actual manifold pressure instead of assuming your car/the tune is broken?
I'd flash back to the initial etune map myself. The first you were sent |
12-15-2016, 12:39 PM | #14 |
Scooby Newbie
Member#: 446029
Join Date: May 2016
Location: 510
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^^Need logs...
leaky BPV? wastegate stuck open? Last edited by tegxsi; 12-15-2016 at 01:08 PM. |
12-15-2016, 02:06 PM | #15 |
Scooby Specialist
Member#: 37003
Join Date: May 2003
Chapter/Region:
MWSOC
Location: Twin Cities
Vehicle:2015 WRX DGM |
Just as I suspected, tuner says there is still a leak somewhere. I'd flash back to the old map to test but that map was tuned on the old rom (pre-2015 wrx ECU recall) so that map will no longer work.
Going to dig into it tonight and hopefully find the issue. |
12-15-2016, 11:21 PM | #16 |
Scooby Specialist
Member#: 395882
Join Date: Jul 2014
Chapter/Region:
MWSOC
Location: GR, Michigan
Vehicle:2016 WRX DGM |
It's possible that your pressure line to the EBCS or wastegate is leaking and its not an actual boost leak that affects the charge. Sounds more likely, actually. A large leak in the manifold (turbo is spun for more PSI than its reading) would probably make the car run like ass, because it will be super rich.
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12-16-2016, 10:26 AM | #17 | |
Scooby Specialist
Member#: 37003
Join Date: May 2003
Chapter/Region:
MWSOC
Location: Twin Cities
Vehicle:2015 WRX DGM |
Quote:
Took everything off last night and reinstalled and saaaaaaame issue. The car boosts right to 14.5-ish psi and will not go over that. 2 tuners are now telling me a leak, so looks like I need to bring it somewhere where they can smoke test it. |
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12-16-2016, 01:52 PM | #18 |
Scooby Newbie
Member#: 446029
Join Date: May 2016
Location: 510
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If it's not a external leak but an internal leak within a closed system then look check stuff like the BPV and WGA arm.
Is it slow to spool up to 14psi? Probe the EBCS connections and see if you are getting a signal from the ECU. This might be tricky though...maybe have someone hookup a DMM while someone inside hold down the throttle with LC activated. Or simply touch the EBCS and see if it's clicking. |
12-17-2016, 12:14 AM | #19 |
Scooby Specialist
Member#: 37003
Join Date: May 2003
Chapter/Region:
MWSOC
Location: Twin Cities
Vehicle:2015 WRX DGM |
Got it figured out - had something to do with the tune/accessport. All is well!
Last edited by dream; 12-17-2016 at 01:02 AM. |
12-17-2016, 11:35 AM | #20 |
Scooby Specialist
Member#: 150006
Join Date: May 2007
Chapter/Region:
SCIC
Location: SGV/LA
Vehicle:2016 WRX Protuned 2004 WRX |
dream, please elaborate about what exactly was wrong.
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12-18-2016, 12:04 PM | #21 |
Scooby Specialist
Member#: 37003
Join Date: May 2003
Chapter/Region:
MWSOC
Location: Twin Cities
Vehicle:2015 WRX DGM |
The tuner sent a new map and boost was now working again (a little too much boost to be honest); that's about all I know at this point.
Last edited by dream; 12-18-2016 at 12:13 PM. |
12-17-2016, 03:34 PM | #22 |
Scooby Newbie
Member#: 443793
Join Date: Mar 2016
Vehicle:2016 WRX m6 ISM 2005 F-150 FX4 |
It was the temperature/compensation tables
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12-17-2016, 10:40 PM | #23 |
Scooby Newbie
Member#: 211173
Join Date: May 2009
Chapter/Region:
MAIC
Location: Baltimore, Maryland
Vehicle:2016 WRX Premium Silver |
Slighlly unrelated, yet completely related, when I had my Volvo C30, I had a turbo control valve which is much the same as the ECBS. My car was registering 17psi on the boost gauge and after I sold it, I finally told people what it had done. They said that on the tune I was on it should have been 20-21psi and that the TCV upgrade actually caused it to run less boost. On the forum, they said that the fix for that is "crushing" the valve. Defeats the purpose of upgrading if you ask me, but that may be related to your issue.
Good luck |
02-22-2024, 01:02 AM | #24 |
Scooby Newbie
Member#: 534223
Join Date: May 2023
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Dream I know this was a long time ago but why didn't you give more info on how the issue was solved? Why not ask your tuner what the issue was or what they did differently on the new map? I'm having a similar issue and it sucks.
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02-23-2024, 02:41 PM | #25 | |
Scooby Newbie
Member#: 386600
Join Date: Apr 2014
Location: Western Canada
Vehicle:2015 WRX |
Quote:
Boost is supposed to be lower in colder weather, since it takes less boost to achieve the same airflow. 19 psi in warm weather might equate to 14 psi in freezing weather. To determine if your boost is actually too low, you need to look at mass airflow, not boost. The COBB OTS tunes and most conservative tuners will target airflow in the 220-240 g/s range at 6k+ rpm, since this is the safe limit of the stock turbo. If your engine is flowing a lot less than this, or less than it normally does in warmer weather, then either the IAT boost or IAT WGDC compensation tables (or both) need to be tweaked. If you upload a log to datazap and link it here, I can take a look at it. |
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