Welcome to the North American Subaru Impreza Owners Club Friday March 29, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Normally Aspirated 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.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 01-08-2014, 12:41 AM   #26
PSBeachBum
Scooby Newbie
 
Member#: 279870
Join Date: Apr 2011
Chapter/Region: MAIC
Location: Honolulu, Hawaii
Vehicle:
2005 WRX Wagon
Black

Default

Dunno if they have TGV as i own wrx but MAYBE your TGV is stuck closed and your not showing a code for it?? Mine is stuck open but i can drive WOT all day long
* Registered users of the site do not see these ads.
PSBeachBum is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-08-2014, 10:40 AM   #27
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

Interesting, that would explain everything if that were the case. I'll have to check.
kred is offline   Reply With Quote
Old 01-08-2014, 07:50 PM   #28
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

My car doesn't have TGV.
kred is offline   Reply With Quote
Old 01-19-2014, 12:21 AM   #29
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

I still don't know what's wrong,

Tuned map: 68 g/s
Stock map: 80 g/s
Stock map minus some fuel: over 100 g/s (still feels just as slow)

This is outrageous. My 3500lb stock baja 2.5i with 257k miles is a lot faster than my newer 2.5i, both 5mt.
kred is offline   Reply With Quote
Old 01-19-2014, 04:13 PM   #30
NDS1521
Scooby Newbie
 
Member#: 269920
Join Date: Jan 2011
Location: Spokane
Vehicle:
04 wrx

Default

Timing off? Check your belt. Also did you ever check the cat being clogged?
NDS1521 is offline   Reply With Quote
Old 01-19-2014, 05:24 PM   #31
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

Quote:
Originally Posted by NDS1521 View Post
Timing off? Check your belt. Also did you ever check the cat being clogged?
Timing was checked by mechanic. Trust me, my "cat" isn't clogged. I've got a 300 mile trip to college tomorrow, I don't want my slow car to ruin it.
kred is offline   Reply With Quote
Old 01-19-2014, 06:22 PM   #32
NDS1521
Scooby Newbie
 
Member#: 269920
Join Date: Jan 2011
Location: Spokane
Vehicle:
04 wrx

Default

Can you run learning view with your car? Check iam, knock and a/f learning. Did the mechanic check compression or do a leak down test?
NDS1521 is offline   Reply With Quote
Old 01-19-2014, 07:34 PM   #33
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

IAM is a perfect 1. No knock is occuring. I was never able to use learning view, my laptop just doesn't let me for some reason. Not sure if the mechanic checked those things; all I know is that my engine is not misfiring at all.
kred is offline   Reply With Quote
Old 01-21-2014, 09:13 PM   #34
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

The key symptom is the fact that just tapping the throttle is the same as WOT. It's like the engine is trying to tell me something. It's saying "no, I don't want any more air" or "help me, I'm choking."
kred is offline   Reply With Quote
Old 01-21-2014, 09:21 PM   #35
mavstang73
Scooby Specialist
 
Member#: 186271
Join Date: Aug 2008
Chapter/Region: NESIC
Location: Killingly CT
Vehicle:
2007 FXT
GRP

Default

Fuel regulator issue?

What about pulling the intake off and verifying the dbw has full travel when given 100% throttle?

Also +1 for timing belt jumping. It won't always throw a code but still run like crap. MT is more susceptible even with the belt guides.

Last edited by mavstang73; 01-21-2014 at 09:26 PM.
mavstang73 is offline   Reply With Quote
Old 01-21-2014, 09:46 PM   #36
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

Quote:
Originally Posted by mavstang73 View Post
Fuel regulator issue?

What about pulling the intake off and verifying the dbw has full travel when given 100% throttle?

Also +1 for timing belt jumping. It won't always throw a code but still run like crap. MT is more susceptible even with the belt guides.
A mechanic actually checked the timing. I took off the intake with the car not running but with the key forward, and the throttle plate opens all the way. Not sure if it would make a difference if I tried that again with the car running because the ecu might not be allowing it to open all the way.
kred is offline   Reply With Quote
Old 01-21-2014, 09:58 PM   #37
NDS1521
Scooby Newbie
 
Member#: 269920
Join Date: Jan 2011
Location: Spokane
Vehicle:
04 wrx

Default

I would check compression next
NDS1521 is offline   Reply With Quote
Old 01-21-2014, 10:34 PM   #38
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

Quote:
Originally Posted by NDS1521 View Post
I would check compression next
I can't see how it would be low compression, unless I suddenly lost an equal amount of compression in all four cylinders causing no misfires. I've had this low power problem for six months now and it hasn't gotten any better or worse. I took a 300 mile drive from Maine to NY yesterday cruising like 65-75 averaging 31 mpg. My car was purring like a kitten when I got there, except it sounded like my exhaust leak got worse in my header mid pipe.
kred is offline   Reply With Quote
Old 01-25-2014, 03:15 AM   #39
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

I may have made a discovery about my car's problem today. I had a huge vacuum leak temporarily after doing something stupid (forgot to bolt up the EGR valve after checking it.) As I was driving with the vacuum leak, the car actually felt a lot faster, first gear felt powerful, and it seemed to rev quicker. I think it was the extra air intake through the EGR valve opening that gave me this extra power. Maybe this means my intake really is restricted? Maybe the butterfly valve?
kred is offline   Reply With Quote
Old 01-25-2014, 11:15 AM   #40
mavstang73
Scooby Specialist
 
Member#: 186271
Join Date: Aug 2008
Chapter/Region: NESIC
Location: Killingly CT
Vehicle:
2007 FXT
GRP

Default

Sure sounds like it to me.
There is something odd going on with your intake track. If you found a tennis ball in there it wouldn't surprise.
mavstang73 is offline   Reply With Quote
Old 01-25-2014, 11:25 AM   #41
Bluefoton
Scooby Guru
 
Member#: 141373
Join Date: Feb 2007
Chapter/Region: E. Canada
Location: Quebec, QC
Vehicle:
2022 Crosstrek Sport
6MT

Default

You mentioned you cleaned - not changed - the air filter. Any chance you coated it with a hermetic silicone paint?
Also, what's your vacuum at WOT?
Bluefoton is offline   Reply With Quote
Old 01-25-2014, 12:30 PM   #42
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

Quote:
Originally Posted by Bluefoton View Post
You mentioned you cleaned - not changed - the air filter. Any chance you coated it with a hermetic silicone paint?
Also, what's your vacuum at WOT?
No, believe me, the air filter is as clean as brand new. I cleaned it twice. Vacuum at WOT is 0.15-0.2 psi, which suggests that the throttle plate should be opening fully, unless my map sensor is going bad?
kred is offline   Reply With Quote
Old 01-25-2014, 06:48 PM   #43
NDS1521
Scooby Newbie
 
Member#: 269920
Join Date: Jan 2011
Location: Spokane
Vehicle:
04 wrx

Default

You sure you don't have TGVs? Look at you map in romraider and you can see if your tuner deleted the code.

It happened to me the tuner sent me a base map from another car and forgot to undo the tgv cel delete (I still had tgvs) and when one of the motors died I couldn't figure out what the hell was going on but obviously eventually figured it out.
NDS1521 is offline   Reply With Quote
Old 01-25-2014, 07:04 PM   #44
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

Quote:
Originally Posted by NDS1521 View Post
You sure you don't have TGVs? Look at you map in romraider and you can see if your tuner deleted the code.

It happened to me the tuner sent me a base map from another car and forgot to undo the tgv cel delete (I still had tgvs) and when one of the motors died I couldn't figure out what the hell was going on but obviously eventually figured it out.
Yes, I'm sure of it. My brother and a friend of his said N/A subies don't have those. There's definitely something holding me back on the intake side, it's in the throttle body or beyond. I'm gonna unplug the maf, take the air box off, start it up, and have a friend rev it to see if the butterfly valve is actually opening fully. I suspect that it only opens a small amount, but we'll see.
kred is offline   Reply With Quote
Old 01-25-2014, 08:19 PM   #45
NDS1521
Scooby Newbie
 
Member#: 269920
Join Date: Jan 2011
Location: Spokane
Vehicle:
04 wrx

Default

I know for a fact that some N/A subies do. Just to be sure I would check your self. I wish I had access to alldata at home gotta wait til Monday before I could look it up now!
NDS1521 is offline   Reply With Quote
Old 01-26-2014, 12:27 AM   #46
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

Quote:
Originally Posted by NDS1521 View Post
I know for a fact that some N/A subies do. Just to be sure I would check your self. I wish I had access to alldata at home gotta wait til Monday before I could look it up now!
Yea, could you let me know please?
kred is offline   Reply With Quote
Old 01-26-2014, 09:20 AM   #47
GrundleJuice
Scooby Specialist
 
Member#: 165749
Join Date: Dec 2007
Location: Detroit, MF'er!
Default

Quote:
Originally Posted by kred View Post

Yea, could you let me know please?
You should be able to visually observe them. They will be located near the ends of the intake runners just before the port/head. Without them you will see a smooth transition from the round runner to the triangle shaped port cross section and nothing in the runner casting except an injector and maybe some bosses for mounting fuel rail, etc. With TGV there will be a small servo motor mounted to the side of one runner per bank. You can google images search "Subaru TGV" to see what to look for.

I also know that some n/a ej engines had TGV's. Maybe it was a pzev thing to help fuel/air mixing?
GrundleJuice is offline   Reply With Quote
Old 01-26-2014, 01:12 PM   #48
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

Quote:
Originally Posted by RaceFaceXC View Post
You should be able to visually observe them. They will be located near the ends of the intake runners just before the port/head. Without them you will see a smooth transition from the round runner to the triangle shaped port cross section and nothing in the runner casting except an injector and maybe some bosses for mounting fuel rail, etc. With TGV there will be a small servo motor mounted to the side of one runner per bank. You can google images search "Subaru TGV" to see what to look for.

I also know that some n/a ej engines had TGV's. Maybe it was a pzev thing to help fuel/air mixing?
Well, my car is a PZEV model. I checked today with the car running and the air box off, and the butterfly valve did open all the way.
kred is offline   Reply With Quote
Old 01-26-2014, 09:26 PM   #49
kred
Scooby Specialist
 
Member#: 351724
Join Date: Mar 2013
Location: Southern Maine
Vehicle:
2006 Legacy GT LTD
OBP

Default

I don't see any tgvs. The intake valve bolts right onto the engine with nothing in between but my phenolic intake manifold spacers and the gaskets. I'm all out of ideas.
kred is offline   Reply With Quote
Old 01-26-2014, 10:05 PM   #50
mavstang73
Scooby Specialist
 
Member#: 186271
Join Date: Aug 2008
Chapter/Region: NESIC
Location: Killingly CT
Vehicle:
2007 FXT
GRP

Default

Just for the hell of it can you take some high res under the hood shots and post them here?

Like some from each side and the front and as close as you can to an overhead?

Maybe we'll spot something out of place.
mavstang73 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 02:28 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.