|
|
|
|
Thread Tools | Display Modes |
09-14-2020, 04:44 PM | #1 |
Scooby Newbie
Member#: 514383
Join Date: May 2020
Location: Ontario, Canada
Vehicle:2016 WRX Base Lapis Blue |
Stage 1 WRX running extremely lean
The car has: TGV/EGR deletes, AEM intake, catback and COBB EBCS.
75% of the time the car runs fine. 25% of the time the AP shows the car leaning out to 18:1 and runs very poor. I pull over and restart the car/change to earlier MAP but it does not fix the issue. If I get into boost again the AF goes back down to 10.14. The leaning out only seems to happen when the car is not completely warmed up. Once the car is up to temp and has been running for a while it never seems to be an issue. I can't replicate the issue unless I let the car sit for hours, then start it and try to drive again. Sometimes when the car is cold and I start it to warm up it throws a code for "extreme rich", if I clear it the code does not come back while driving. I have changed the spark plugs, cleaned the MAF and MAP sensors, checked the MAF voltage, had 2 shops perform smoke tests on the intake and sent logs to my tuner. The tuner still believes that my issue is a leak between the turbo and the heads. I am wondering what my next steps should be? I am thinking of adding a wideband sensor and or replacing my O2 sensors. Last resort is to buy a new speed density tune. Link to datalog: https://imgur.com/gallery/1aThVsJ?s=sms Edit: The AF learning has gotten much better (-8.59%) but nothing has been changed on the car since I took that datalog.
* Registered users of the site do not see these ads.
Last edited by Ssinclair77; 09-14-2020 at 04:47 PM. Reason: Adding info. |
09-14-2020, 06:36 PM | #2 |
*** Banned ***
Member#: 500337
Join Date: Apr 2019
|
Maybe use proper intake with proper mapping. Maybe purchase proper custom tune. Youre not giving us enough info or a log/data. 8% af correction when? I have 20/10 so 30% max correction swings and no bucking. <3% correction under heavy load and 1% at wot. What tune are you running now and why hasnt this been addressed during tuning, or if it has been then how?
|
09-14-2020, 07:34 PM | #3 |
Scooby Specialist
Member#: 29292
Join Date: Nov 2002
Chapter/Region:
SCIC
Location: Orange County CA
Vehicle:2004 WRX wagon silver |
Quote:
|
09-14-2020, 08:13 PM | #4 |
Scooby Newbie
Member#: 420856
Join Date: May 2015
|
Quote:
|
09-15-2020, 09:31 AM | #5 |
Scooby Newbie
Member#: 486921
Join Date: Jun 2018
Chapter/Region:
NESIC
Location: Upstate NY
Vehicle:2018 Outback Tungsten |
You have a stage 1 OTS tune and you have EGR deletes? How'd you overcome the CEL? What do you mean "Change over to MAP"? Like you have an MAPerformance off-the-shelf tune?
|
09-15-2020, 10:44 AM | #6 |
Scooby Specialist
Member#: 431550
Join Date: Oct 2015
Location: South Florida
Vehicle:2016 WRX ALL THE STAGES |
inb4 kaboom thread
|
09-15-2020, 10:50 AM | #7 |
Scooby Specialist
Member#: 504432
Join Date: Jul 2019
Chapter/Region:
Tri-State
|
My general feeling is that these Subaru engines aren't very durable. However, threads like this make me suspect that the vast majority of the issues are due to user error.
|
09-15-2020, 11:26 AM | #8 |
Scooby Newbie
Member#: 486921
Join Date: Jun 2018
Chapter/Region:
NESIC
Location: Upstate NY
Vehicle:2018 Outback Tungsten |
Thats basically what I got out of the Engine Failure thread. The only people who are getting engine failure are those that beat the snot out of their engine and also installed bad mods, bad tunes or made bad choices otherwise. There are actually very few people who had stock engines with stock oil, etc who had engine failure due to factory defect or something.
|
09-15-2020, 03:32 PM | #9 |
Scooby Specialist
Member#: 431550
Join Date: Oct 2015
Location: South Florida
Vehicle:2016 WRX ALL THE STAGES |
|
09-15-2020, 04:47 PM | #10 | |
Scooby Newbie
Member#: 416873
Join Date: Mar 2015
Chapter/Region:
NESIC
Location: Boston, MA
Vehicle:2015 WRX |
Quote:
You're second point is correct, and it gets even worse when you start questioning some of the people that have failures and figure out they have no idea about modding/tuning/maintenance/driving a boosted vehicle in general. |
|
09-15-2020, 05:32 PM | #11 |
Scooby Specialist
Member#: 453427
Join Date: Aug 2016
Chapter/Region:
MWSOC
Location: Detroit, MI
Vehicle:2017 WRX Crystal White Pearl |
"The tuner still believes that my issue is a leak between the turbo and the heads."
Check the header bolts, they are known to come loose over time and cause crazy behavior. There is a TSB out by Subaru to address it. |
09-15-2020, 06:25 PM | #12 |
Scooby Newbie
Member#: 501927
Join Date: May 2019
|
|
09-15-2020, 07:30 PM | #13 | |
Scooby Specialist
Member#: 504432
Join Date: Jul 2019
Chapter/Region:
Tri-State
|
Quote:
|
|
09-16-2020, 01:00 PM | #14 | |
Scooby Newbie
Member#: 222521
Join Date: Sep 2009
Chapter/Region:
South East
Location: callahan florida
Vehicle:2017 WRX Prem WRB |
Quote:
I'd argue the popularity and success of the early WRX has brought a lot of people who shouldnt be modifying cars due to either their inability to read/follow directions or a lack of common sense in the automotive world. heck, i bought a bugeye after i graduated high school in 07 and i remember how the WRX craze was starting to skyrocket and bring in bozos even back then. |
|
09-21-2020, 06:53 AM | #15 | |
Scooby Newbie
Member#: 459394
Join Date: Dec 2016
Chapter/Region:
Tri-State
Location: Rochester, NY
Vehicle:2015 WRX Crystal White |
Thirded.
Quote:
99% of blown up/ruined Subaru products I've encountered personally are due to user error or neglect, but they always leave out that they 'forgot the change the oil 9,000 miles ago' or that 'that intake wasn't on the list of approved parts for an off-the-shelf tune but I used it anyway because I like the whistle noises'. |
|
Thread Tools | |
Display Modes | |
|
|