Welcome to the North American Subaru Impreza Owners Club Sunday November 19, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

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 02-15-2017, 09:33 PM   #1
BeagleOne
Scooby Newbie
 
Member#: 453056
Join Date: Aug 2016
Chapter/Region: South East
Location: Sumter, SC
Question 2016 STi - Limp Mode?

Guys,

My 16' Sti started acting up last Month. It would hesitate and bog a little when giving it the gas with normal driving. It got worse over the next couple of weeks and I decided to take it to the dealer. No CEL though. It took a week or so to get an appointment and during this time I did not drive it. Well today they tell me they can't find anything wrong with it. On the way home it is still doing the same thing. Either the mechanics are incompetent or the dealership doesn't want to mess with it. Either way I just did not get a good feeling about the dealership. Anyway, a little more info. Whenever you press the accelerator, it just bogs. At WOT no power just bogging. Boost Max @ 9.5 at WOT no matter what SI Drive setting. Does this sound like the car is in limp mode? How to tell for sure? BTW the car is completely stock except for axelback exhaust. I have an access port but it is not installed on the car. I think I am going to install it and take a look at the parameters. Any advice, tips, thoughts?
* Registered users of the site do not see these ads.
BeagleOne is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-15-2017, 10:34 PM   #2
SubieHondaGuy
Scooby Newbie
 
Member#: 312223
Join Date: Mar 2012
Chapter/Region: RMIC
Location: Colorado Springs
Vehicle:
2002 WRX
Silver

Default

There is a reflash on low boost at ambient temp on 91 octane., did they check that?
SubieHondaGuy is offline   Reply With Quote
Old 02-15-2017, 10:52 PM   #3
BeagleOne
Scooby Newbie
 
Member#: 453056
Join Date: Aug 2016
Chapter/Region: South East
Location: Sumter, SC
Default

I cannot say what they checked. I was not able to actually speak to the service tech.
BeagleOne is offline   Reply With Quote
Old 02-15-2017, 10:53 PM   #4
SubieHondaGuy
Scooby Newbie
 
Member#: 312223
Join Date: Mar 2012
Chapter/Region: RMIC
Location: Colorado Springs
Vehicle:
2002 WRX
Silver

Default

Not sure if this is your solution without looking at it, but worth checking into.
SubieHondaGuy is offline   Reply With Quote
Old 02-15-2017, 10:56 PM   #5
BeagleOne
Scooby Newbie
 
Member#: 453056
Join Date: Aug 2016
Chapter/Region: South East
Location: Sumter, SC
Default

Right now my GF's Hyundai has more HP than my STi
BeagleOne is offline   Reply With Quote
Old 02-16-2017, 03:52 AM   #6
carlos.danger
Scooby Specialist
 
Member#: 363268
Join Date: Jul 2013
Location: California
Vehicle:
2015 WRX STi
WRB

Default

Are you driving it using the parking valet key?


Why didnt you immediately turn around and go back to the dealership and have a tech do a test drive with you?
carlos.danger is offline   Reply With Quote
Old 02-16-2017, 07:41 AM   #7
rtv900
Scooby Specialist
 
Member#: 428511
Join Date: Aug 2015
Location: philadelphia
Vehicle:
2016 STI

Default

Quote:
Originally Posted by carlos.danger View Post
Are you driving it using the parking valet key?


Why didnt you immediately turn around and go back to the dealership and have a tech do a test drive with you?
does that key really change those things?
rtv900 is offline   Reply With Quote
Old 02-16-2017, 07:43 AM   #8
BeagleOne
Scooby Newbie
 
Member#: 453056
Join Date: Aug 2016
Chapter/Region: South East
Location: Sumter, SC
Default

I did leave the valet key with them at the dealership and use it to drive home. Does that cut the car back? I wanted them to do a test drive with me but they didn't 'have anyone available'. I work until 4 o'clock, it takes me a hour+ to get there due to heavy traffic at that time. They are busy and get to me around 5:45 and close at 6:00 o'clock. I didn't even think about the key. I only grabbed it when I took the car over there because I didn't want to take my key off of my key chain. If that key cuts the car back, I would have thought that they would have mentioned something about it. I will try my regular key.
BeagleOne is offline   Reply With Quote
Old 02-16-2017, 08:07 AM   #9
BeagleOne
Scooby Newbie
 
Member#: 453056
Join Date: Aug 2016
Chapter/Region: South East
Location: Sumter, SC
Default

Ok so I'm at work now and drove the car. I am a dumb ass. It was the valet key causing the bogging. It definitely cuts the car back. That may be why they did not notice the real problem. So the car still has the problem. Boost is maxed @ 10 with WOT and with the regular key. The car is still hesitating and bucking when accelerating. I am going to pull the battery cable and reset the ECU, maybe at lunch time today or when I get off.
BeagleOne is offline   Reply With Quote
Old 02-16-2017, 01:58 PM   #10
BeagleOne
Scooby Newbie
 
Member#: 453056
Join Date: Aug 2016
Chapter/Region: South East
Location: Sumter, SC
Default

OK, I reset the ECU at lunch and it seems to be back to normal. Not sputtering, bogging or bucking just smooth acceleration. I only got to drive it for about five minutes but it does seem to back to normal. Do you guys think I could have gotten bad gas that put the car into limp mode? An Anomaly? I'll just wait and see what happens as I drive it more.
BeagleOne is offline   Reply With Quote
Old 02-16-2017, 04:06 PM   #11
carlos.danger
Scooby Specialist
 
Member#: 363268
Join Date: Jul 2013
Location: California
Vehicle:
2015 WRX STi
WRB

Default

:captainkirkfacepalm:

lol

I think you used the valet key and that was the source of your problems.


and yes rtv900, that's what the valet key is for.
carlos.danger is offline   Reply With Quote
Old 02-19-2017, 10:16 PM   #12
carlos.danger
Scooby Specialist
 
Member#: 363268
Join Date: Jul 2013
Location: California
Vehicle:
2015 WRX STi
WRB

Default

Running ok now?
carlos.danger is offline   Reply With Quote
Old 02-20-2017, 01:03 PM   #13
Zcypot
Scooby Newbie
 
Member#: 372777
Join Date: Nov 2013
Chapter/Region: SCIC
Location: Compton, CA
Vehicle:
2014 WRX Sedan Lmtd
WRB

Default

What a crazy issue, I was thinking BPV leak the whole time.
Zcypot is offline   Reply With Quote
Old 11-03-2017, 11:09 AM   #14
zZHELIXZz
Scooby Newbie
 
Member#: 330871
Join Date: Sep 2012
Chapter/Region: SCIC
Location: Paso Robles
Vehicle:
2016 Impreza
White

Default

Had the same issue in my 16 STi, dealer also far af, get out of work also at around 430 and it scared the **** outta me. Disconnected the battery and it seemed to solve everything. I still have my appointment and im still going up there, but hey i can vouch, it works.
zZHELIXZz is offline   Reply With Quote
Old 11-03-2017, 02:31 PM   #15
sooper_wrx12
Scooby Newbie
 
Member#: 415051
Join Date: Mar 2015
Chapter/Region: MAIC
Vehicle:
2014 WRX STI Limited
DGM

Default

If you had your Accessport hooked up, you would've probably noticed that you car experienced a knock event that caused the DAM to drop to a safe value. It takes time for your car you "experiment" with advancing the timing for the DAM value to return to normal. The more you can replicate the conditions of the original knock event, the quicker the car will figure out "normal" again, if it's safe.

For those who've experienced this, if you have an AP and notice that you're DAM is not decreasing any further or you're not experiencing any more knock events, resetting the ECU usually is the quickest way to get back to normal. So, by disconnecting the battery or pulling the fuse, you accomplished that.

I'd keep an eye on it though. If you do another WOT pull and you feel timing being pulled again, you might want to have to checked out. I think that you don't need to actually "install" your AP to make use of its monitoring ability. Just connect it to the OBD port and use it as a monitor. Just don't flash anything, if you're concerned with the dealer giving you crap about any engine issues in the future.
sooper_wrx12 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 01:20 AM.


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