Welcome to the North American Subaru Impreza Owners Club Thursday August 22, 2019
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L 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 07-15-2019, 03:44 PM   #1
Alfred_Buchi
Scooby Newbie
 
Member#: 382022
Join Date: Feb 2014
Location: Socal
Vehicle:
2003 WRX

Default EGT Code but no EGT present & Cobb AP Installed

After filling up (CA 91 premium, usual Shell station) and driving about 12 miles in ~80 degree ambient temp, I noticed some trouble accelerating in 4th on the freeway @ 70mph.

I pulled off the freeway and hooked up my AP. No CEL codes showed up on my dash but checking the AP code reader it showed "P1544 - Exhaust Gas Temperature Too HighĒ - This is odd because my up pipe is a grim speed unit with no EGT. Iíve never seen this code on my car in 3 years of using this AP. Also my DTC dropped to zero, I was in full limp mode, no boost, fine knock learn hitting Ė11.XX at 50% throttle, car was barely moving, but no feedback knock, and my AF learning numbers were normal -1.xx to +4.xx.

After pulling over and looking for anything obvious, nothing seemed out of place. So I reset the ECU with the AP, and things went back to relatively normal. AP no longer shows the code, most of my numbers seem fine, I can build some boost again but I am scared to push it hard (only hit maybe 8psi so far) or do a data log with the DAM still only reaching 15 instead of usual 16.

Any ideas here guys? Would you think itís safe to perform a full throttle data log with this situation? Or would a lower throttle log be beneficial?

Should I consider unpairing and re-pairing the AP?

Car: 2003 wrx
Mods: Grimspeed up pipe, cobb catted down pipe, cobb cat back exhaust
Tune: Cobb AP Stage 2 (CA/AZ 91 map)
* Registered users of the site do not see these ads.
Alfred_Buchi is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 07-21-2019, 12:20 AM   #2
subaru_gc8
Scooby Specialist
 
Member#: 29292
Join Date: Nov 2002
Chapter/Region: SCIC
Location: Orange County CA
Vehicle:
2004 WRX wagon
silver

Default

heres the problem with cobb stuff, if you now are getting a code for some reason it has un defeated itself. so with cobb there is no way to look into the tunes to see if it turned off inless you go to a certified cobb specialist. in other words pay for someone to look into it.
subaru_gc8 is offline   Reply With Quote
Old 07-23-2019, 08:18 PM   #3
Alfred_Buchi
Scooby Newbie
 
Member#: 382022
Join Date: Feb 2014
Location: Socal
Vehicle:
2003 WRX

Default

I'm not sure I understand your complaint with Cobb GC8 - I've been emailing them with logs and going back and fourth with ideas and they've been extremely helpful.

I did not have a CEL actually come on my dash, the car did go into limp mode, and the AP did show a EGT code.

However, I am coming to the conclusion that when the car is in limp mode, the accessport can view the code that it usually suppresses.

The more important question is becoming, why is the car entering limp mode?

After a week and a fresh tank of fuel, my DAM has returned to 16 where it should be, but during a 3rd gear pull yesterday to get a data log, I had a boost spike to 20 psi! Usual is 15.5 ish in 3rd.

So this makes me think that potentially, during my 4th gear cruising at 70, the shift to 5th also prompted a boost spike which may have been more extreme causing limp mode to come into play.

I'm going to drive the same road tonight and see if I can replicate this again.

EBCS? I'm on the original from 2003 - I may pull it and clean/test tonight.

This is so frustrating - I was ready to sell this car last month and these little stupid issues keep popping up.
Alfred_Buchi is offline   Reply With Quote
Old 07-23-2019, 09:39 PM   #4
Brandon Tchida
Scooby Newbie
 
Member#: 379963
Join Date: Jan 2014
Location: Central Minnesota
Vehicle:
2002 TS Wagon
Dark Blue

Default

Iíve had issues similar, mine was a boost leak which caused it to run lean and give a high EGT code.

It may be worth looking at hoses/gaskets for leaks. 🤷🏼*♂️
Brandon Tchida is offline   Reply With Quote
Old 07-23-2019, 10:00 PM   #5
Aurielo24
*** Banned ***
 
Member#: 502816
Join Date: Jun 2019
Default

Quote:
Originally Posted by Alfred_Buchi View Post
I'm not sure I understand your complaint with Cobb GC8 - I've been emailing them with logs and going back and fourth with ideas and they've been extremely helpful.

I did not have a CEL actually come on my dash, the car did go into limp mode, and the AP did show a EGT code.

However, I am coming to the conclusion that when the car is in limp mode, the accessport can view the code that it usually suppresses.

The more important question is becoming, why is the car entering limp mode?

After a week and a fresh tank of fuel, my DAM has returned to 16 where it should be, but during a 3rd gear pull yesterday to get a data log, I had a boost spike to 20 psi! Usual is 15.5 ish in 3rd.

So this makes me think that potentially, during my 4th gear cruising at 70, the shift to 5th also prompted a boost spike which may have been more extreme causing limp mode to come into play.

I'm going to drive the same road tonight and see if I can replicate this again.

EBCS? I'm on the original from 2003 - I may pull it and clean/test tonight.

This is so frustrating - I was ready to sell this car last month and these little stupid issues keep popping up.
+1
Aurielo24 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 07:04 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2019 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.