Welcome to the North American Subaru Impreza Owners Club Saturday August 18, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > FA Series Factory 2.0L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 12-27-2015, 11:58 AM   #1
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default 2015 WRX Code P0172-Fuel Running Rich?

Hey All,

I have a 2015 WRX Limited that stage 2 with a pro tune.

Mods: Cobb Turbo-Back, ETS Intake w/Box.

I recently had the dealer replace a bad throwout bearing in my car. Apparently they had to disconnect the battery to do the work.

One day after I picked up my car, the car was idling very rough and low. Until it would start to stall out constantly, and throw a code P0172.

Had it sent back to dealer, they can't seem to find any loose parts, or hoses, or any dirty MAF sensor, or find any leaks. It's been there for a week.

My tuner says it can't be the tune that is off, and that something must be leaking. I checked, and the protune is still on the ecu, so I am not sure what is wrong.

Anyone have any experience or input with this? I've checked all threads and posts online regarding this and looked into everything that was mentioned but still no resolution. At this point running out of time too as they need the loner car back.

Any input helps!

Thanks,
-V
* Registered users of the site do not see these ads.
KeshyWRX is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 12-27-2015, 02:17 PM   #2
SeeeeeYa
Scooby Specialist
 
Member#: 129681
Join Date: Oct 2006
Chapter/Region: MAIC
Location: WV
Vehicle:
2017 FXT-T ES
SBM/SBL

Default

Reload your tune. Some parts of a tune stay with a battery disconnect, some do not.
SeeeeeYa is offline   Reply With Quote
Old 12-27-2015, 02:33 PM   #3
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Quote:
Originally Posted by SeeeeeYa View Post
Reload your tune. Some parts of a tune stay with a battery disconnect, some do not.
What I tried was, Uninstalling the AP. Then I reloaded my Protune on there. It still had the same problem.

I should've mentioned that sorry.

Only thing I haven't tried is using maybe the Cobb stage 2+ tune and see if that worked. But I doubt it would make a difference.

Thanks for the input!

-V
KeshyWRX is offline   Reply With Quote
Old 12-27-2015, 02:46 PM   #4
james-30
Scooby Newbie
 
Member#: 430450
Join Date: Sep 2015
Location: Indianapolis
Vehicle:
2016 WRX
WRB

Default

curious question. Are you having your car fixed under warranty? I have a 16 with stage 1. I have everything to go ahead with stage 2 but im leery about warranty work.
james-30 is offline   Reply With Quote
Old 12-27-2015, 02:55 PM   #5
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Quote:
Originally Posted by james-30 View Post
curious question. Are you having your car fixed under warranty? I have a 16 with stage 1. I have everything to go ahead with stage 2 but im leery about warranty work.
For the moment, yes I am. The car only had 7,200 miles on it and i've had it for only 1 year.

It all depends on your dealer. If you dealer is mod friendly then go for it. But there may still be risks. If you end up having major issues like a blown motor for example, you may end up being out of luck.

-V
KeshyWRX is offline   Reply With Quote
Old 12-27-2015, 03:08 PM   #6
james-30
Scooby Newbie
 
Member#: 430450
Join Date: Sep 2015
Location: Indianapolis
Vehicle:
2016 WRX
WRB

Default

Quote:
If you end up having major issues like a blown motor for example, you may end up being out of luck.
Yea that's common sense.

My car right now has something like 1600 miles. I read all the stage 2 horror story's with the 15-16 and it has kinda mind [email protected]%ed me.

I was just curious, cause I'm concerned about even taking my car in for maintenance with intake and turbo back.
james-30 is offline   Reply With Quote
Old 12-27-2015, 03:36 PM   #7
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Quote:
Originally Posted by james-30 View Post
Yea that's common sense.

My car right now has something like 1600 miles. I read all the stage 2 horror story's with the 15-16 and it has kinda mind [email protected]%ed me.

I was just curious, cause I'm concerned about even taking my car in for maintenance with intake and turbo back.
I honestly haven't been hearing about any horror stories. These cars are way more solid that the previous gens. Especially the engines. I used to have a 2013 STi which had a cracked ringland at 20K miles.

The only issues are really the throw out bearing, which has been common with even the previous gen WRX's apparently. And I just seem to be having some weird issue making my car run lean which is stalling out my car, hence undriveable. It only happened after the battery was reset. So I am researching like crazy and contacting my tuner/dealer to check it out. The car and engine is unharmed though. Engine has only seen -1.41 Feedback and Fine Knock 4 times in the past 4 months it's been stage 2/protuned. The car is pretty solid. Just maintain it, and don't redline it like a high rev motor all the time.

-V
KeshyWRX is offline   Reply With Quote
Old 12-27-2015, 04:25 PM   #8
james-30
Scooby Newbie
 
Member#: 430450
Join Date: Sep 2015
Location: Indianapolis
Vehicle:
2016 WRX
WRB

Default

Are you dyno or E pro tuned?
james-30 is offline   Reply With Quote
Old 12-27-2015, 05:11 PM   #9
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Quote:
Originally Posted by james-30 View Post
Are you dyno or E pro tuned?
Dyno Tune
KeshyWRX is offline   Reply With Quote
Old 12-27-2015, 11:10 PM   #10
Wireeater
Scooby Specialist
 
Member#: 76503
Join Date: Dec 2004
Chapter/Region: MAIC
Location: VA
Vehicle:
2016 Mustang GT

Default

Quote:
Originally Posted by james-30 View Post
Yea that's common sense.

My car right now has something like 1600 miles. I read all the stage 2 horror story's with the 15-16 and it has kinda mind [email protected]%ed me.

I was just curious, cause I'm concerned about even taking my car in for maintenance with intake and turbo back.
What horror stories do you hear? FA20DIT is a solid car on stage II tunes... Who do you hear these stories from? People who don't even have a stage II FA20DIT?
Wireeater is offline   Reply With Quote
Old 12-28-2015, 11:53 AM   #11
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Anyone have any ideas relating to the original post?
KeshyWRX is offline   Reply With Quote
Old 12-28-2015, 12:20 PM   #12
Wireeater
Scooby Specialist
 
Member#: 76503
Join Date: Dec 2004
Chapter/Region: MAIC
Location: VA
Vehicle:
2016 Mustang GT

Default

Take some logs and post them up. It would make something like that a bit easier to diagnose.
Wireeater is offline   Reply With Quote
Old 12-28-2015, 01:22 PM   #13
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Quote:
Originally Posted by Wireeater View Post
Take some logs and post them up. It would make something like that a bit easier to diagnose.
How do I attach the log?

I have an excel file saved on my desktop.
KeshyWRX is offline   Reply With Quote
Old 12-28-2015, 01:50 PM   #14
ichabod11swp
Scooby Newbie
 
Member#: 288345
Join Date: Jul 2011
Location: NJ
Vehicle:
2015 WRX Limited
CBS

Default

Every one of these threads turn into a warranty discussion circle jerk, it's ridiculous.

OP, I had the same code and it ended up being a leak created by a loose nut on the lower egr delete plate. I know you dont have an egr delete but worth mentioning as an FYI.
ichabod11swp is offline   Reply With Quote
Old 12-28-2015, 02:00 PM   #15
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Quote:
Originally Posted by ichabod11swp View Post
Every one of these threads turn into a warranty discussion circle jerk, it's ridiculous.

OP, I had the same code and it ended up being a leak created by a loose nut on the lower egr delete plate. I know you dont have an egr delete but worth mentioning as an FYI.
Hmm good to know thanks!

Were you experiencing rough idle then immediate stalling right after starting the car every time as well?

-V
KeshyWRX is offline   Reply With Quote
Old 12-28-2015, 02:05 PM   #16
ichabod11swp
Scooby Newbie
 
Member#: 288345
Join Date: Jul 2011
Location: NJ
Vehicle:
2015 WRX Limited
CBS

Default 2015 WRX Code P0172-Fuel Running Rich?

Quote:
Originally Posted by KeshyWRX View Post
Hmm good to know thanks!



Were you experiencing rough idle then immediate stalling right after starting the car every time as well?



-V

Yes, idled like ****. Was also getting a misfire code.


I could clear the code and reset the ecu and the car would run fine right up until the boost gauge crossed the 0 into positive pressure and the code would come back and the car would go back to running extremely rough.

Once I found and fixed the loose nut and cleared the codes the car went back to running well.

The car only stalled once on me and it was at a stop sign.

Last edited by ichabod11swp; 12-28-2015 at 02:12 PM.
ichabod11swp is offline   Reply With Quote
Old 12-28-2015, 02:16 PM   #17
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Quote:
Originally Posted by ichabod11swp View Post
Yes, idled like ****. Was also getting a misfire code.


I could clear the code and reset the ecu and the car would run fine right up until the boost gauge crossed the 0 into positive pressure and the code would come back and the car would go back to running extremely rough.

Once I found and fixed the loose nut and cleared the codes the car went back to running well.

The car only stalled once on me and it was at a stop sign.
Hmm good to know. My car is constantly stalling. I basically can't even drive the car.

This definitely means something is loose. It definitely is not tune related.

Thanks for you help!

If I knew how to post up my datalog on here I would to help.

Thanks,
-V
KeshyWRX is offline   Reply With Quote
Old 12-28-2015, 03:16 PM   #18
milosav2
Scooby Newbie
 
Member#: 431101
Join Date: Sep 2015
Default

Quote:
Hmm good to know. My car is constantly stalling. I basically can't even drive the car.

This definitely means something is loose. It definitely is not tune related.

Thanks for you help!

If I knew how to post up my datalog on here I would to help.

Thanks,
-V
Use this. Just click Choose File and find your excel file then click UPLOAD. Finally, copy the Link for using on forums 1 and put it in your reply.

And we should see something like this in your reply:

milosav2 is offline   Reply With Quote
Old 12-28-2015, 03:32 PM   #19
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Quote:
Originally Posted by Wireeater View Post
Take some logs and post them up. It would make something like that a bit easier to diagnose.
Quote:
Originally Posted by milosav2 View Post
Use this. Just click Choose File and find your excel file then click UPLOAD. Finally, copy the Link for using on forums 1 and put it in your reply.

And we should see something like this in your reply:

Let me know if this works?

KeshyWRX is offline   Reply With Quote
Old 12-28-2015, 03:45 PM   #20
milosav2
Scooby Newbie
 
Member#: 431101
Join Date: Sep 2015
Default

Quote:
Let me know if this works?
Yup, works great. Now just wait for someone more knowledgeable on the subject to chime in.
milosav2 is offline   Reply With Quote
Old 12-28-2015, 08:52 PM   #21
Ericthered545
Scooby Newbie
 
Member#: 411430
Join Date: Jan 2015
Location: Ohio
Vehicle:
2015 WRX

Default

This is why I don't prefer taking my car to the stealer for "service". You say it was running fine and then you get it back and it's screwed up? I bet one of those numbskulls took it for a ride and beat the snot out of it.

Then it will sit there for a month until they tell you aftermarket parts are the cause of your troubles. After that you will take it home and find out one of your vacuum lines popped loose and is was something simple as that.
Ericthered545 is offline   Reply With Quote
Old 12-28-2015, 09:17 PM   #22
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Quote:
Originally Posted by Ericthered545 View Post
This is why I don't prefer taking my car to the stealer for "service". You say it was running fine and then you get it back and it's screwed up? I bet one of those numbskulls took it for a ride and beat the snot out of it.

Then it will sit there for a month until they tell you aftermarket parts are the cause of your troubles. After that you will take it home and find out one of your vacuum lines popped loose and is was something simple as that.

Actually, my dealership is very respectful and cool with me about my car. Bought two cars from them, and will buy more. I check the mileage when I drop off. They only drove one mile, which is expected as they needed to test the car before giving it back to me. They are not the type to be disrespectful of others cars. Some employees there are enthusiasts as well. Which again is a shame that they don't know the problem lol. They are not trying to blame the parts. It unfortunately just seems like the head techs there are novice's, if they can't figure out the issue from a cel code.

Thanks,
-V
KeshyWRX is offline   Reply With Quote
Old 12-28-2015, 09:24 PM   #23
Ericthered545
Scooby Newbie
 
Member#: 411430
Join Date: Jan 2015
Location: Ohio
Vehicle:
2015 WRX

Default

Quote:
Originally Posted by KeshyWRX View Post
Actually, my dealership is very respectful and cool with me about my car. Bought two cars from them, and will buy more. I check the mileage when I drop off. They only drove one mile, which is expected as they needed to test the car before giving it back to me. They are not the type to be disrespectful of others cars. Some employees there are enthusiasts as well. Which again is a shame that they don't know the problem lol. They are not trying to blame the parts. It unfortunately just seems like the head techs there are novice's, if they can't figure out the issue from a cel code.

Thanks,
-V

Good. And I agree they should be able to figure this out. They had to remove just a lot of things to get to the TOB. Sounds like they need to retrace their steps until they figure out which part was forgotten. They don't have to guarantee the parts but they should guarantee the work was done right.
Ericthered545 is offline   Reply With Quote
Old 12-29-2015, 11:54 AM   #24
KeshyWRX
Scooby Newbie
 
Member#: 423890
Join Date: Jun 2015
Location: Massachusetts
Vehicle:
2017 WRX STI Base
WRB

Default

Anyone have any input on the datalog?

I am stumped, and unfortunately still no word from the dealer. Not sure if they are going to figure it out.

-V
KeshyWRX is offline   Reply With Quote
Old 12-30-2015, 09:58 AM   #25
milosav2
Scooby Newbie
 
Member#: 431101
Join Date: Sep 2015
Default

Quote:
Anyone have any input on the datalog?
I am assuming this datalog was done at idle from just looking at the RPM? Anyways, your A/F Learning 1 is extremely low on several occasions (should be about +/- 8, the closer to 0 the better).

Clean your MAF sensor with some MAF sensor cleaner and have an intake tract smoke test performed to verify that no vacuum leaks are present (which I believe is the case with such low A/F Learning 1 values). There is probably a lose or missing hose somewhere in your intake tract.
milosav2 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 11:53 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.