Welcome to the North American Subaru Impreza Owners Club Wednesday May 29, 2024
Home Forums Images 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.







* 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 12-24-2006, 05:14 PM   #1
v8eaterWRX
Scooby Guru
 
Member#: 108547
Join Date: Feb 2006
Chapter/Region: SWIC
Location: boondock camping
Vehicle:
2017 Tundra 1794
Lifted, Armored, Muddy AF

Default wont boost over 5psi

I took my car from Phoenix, AZ to Flagstaff, AZ for Christmas. This morning when I went to leave my hotel the car didn't want to start. When it finally started, it idled really weird, going from around 500 rpms to 2000 rpms. Felt like it was going to die. I let it run for about ten minutes before leaving to warm up. Now it will not boost over 5 psi. Last night I put gas in it at a litle hole in the wall station last night because it was the only one around so I think I may have gotten bad gas, but I have no cel. I added some octane booster to see if it would change, but nothing yet. Yesterday before I left it shot some black crap out of the exhaust but I assumed it was from the Lucas injector cleaner I was running. The exhaust seems clean now. Reset the ecu and changed the realtime map to stage 2 91 octane but still won't boost. No metal shavings in the oil, and its a fresh change to Royal Purple 10w40. Car is an 05 wrx, perrin inlet hose, sti tmic, helix catted down, greddy evo 2 cb, cobb up, cobb ap.
* Registered users of the site do not see these ads.
v8eaterWRX is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 12-24-2006, 05:17 PM   #2
nkx
Scooby Specialist
 
Member#: 96951
Join Date: Sep 2005
Chapter/Region: MAIC
Location: Carlisle, PA
Vehicle:
2004 wrx sedan
'10 Outback 6mt-wifey's

Default

did you check all the vac/boost hoses? and the hoses on the output side of the compressor?
nkx is offline   Reply With Quote
Old 12-24-2006, 05:23 PM   #3
v8eaterWRX
Scooby Guru
 
Member#: 108547
Join Date: Feb 2006
Chapter/Region: SWIC
Location: boondock camping
Vehicle:
2017 Tundra 1794
Lifted, Armored, Muddy AF

Default

yup. no abnormal noises like leaks either. the turbo to tmic is off a little but still sealed (always like this, only about 1/8''). someone said my turbo may be shot, its at 31k so I guess maybe, but only had the junk in the exhaust once.
v8eaterWRX is offline   Reply With Quote
Old 12-24-2006, 05:31 PM   #4
lancelucas
Scooby Specialist
 
Member#: 124282
Join Date: Aug 2006
Chapter/Region: NWIC
Location: 30000 ft
Vehicle:
04 WRX Wagon PSM
13 STI Sedan SWP

Default

There's always a chance the black stuff was your cat de-catting itself (thought it doesn't sound related to the rough running/low boost). How many miles you got on it?
lancelucas is offline   Reply With Quote
Old 12-24-2006, 05:35 PM   #5
v8eaterWRX
Scooby Guru
 
Member#: 108547
Join Date: Feb 2006
Chapter/Region: SWIC
Location: boondock camping
Vehicle:
2017 Tundra 1794
Lifted, Armored, Muddy AF

Default

at least 10k maybe 20k. could the low boost be because of bad gas?
v8eaterWRX is offline   Reply With Quote
Old 12-24-2006, 05:38 PM   #6
haw4747
Scooby Newbie
 
Member#: 135714
Join Date: Dec 2006
Default

Quote:
Originally Posted by v8eaterWRX View Post
at least 10k maybe 20k. could the low boost be because of bad gas?

i don;t think bad gas would cause you to not boost above 5psi. it would certainly hurt your ability to conrol knocking but it wouldn't reduce boost so severely.
haw4747 is offline   Reply With Quote
Old 12-24-2006, 09:50 PM   #7
v8eaterWRX
Scooby Guru
 
Member#: 108547
Join Date: Feb 2006
Chapter/Region: SWIC
Location: boondock camping
Vehicle:
2017 Tundra 1794
Lifted, Armored, Muddy AF

Default

I checked my boost electronically with my ap and it is reading 13-14 psi, so it seems that my mechanical gauge is just off? I'm still a little low, but not as drastically. I guess its just the change in elevation?
v8eaterWRX is offline   Reply With Quote
Old 12-25-2006, 03:05 AM   #8
Master2192
RIP 10/12/83 to 02/10/08
Scooby Specialist
 
Member#: 83254
Join Date: Mar 2005
Chapter/Region: NWIC
Location: Roy, Washington
Vehicle:
98 2.5 RS
04 WRX

Default

Quote:
Originally Posted by haw4747
i don't think bad gas would cause you to not boost above 5psi.
If the Ignition Advanced Multiplier [IAM] drops low enough because of knock, the ECU turns off boost control and this would limit him to wastegate boost (7-9 psi) which could show up as 5 if his boost gauge is off.
Master2192 is offline   Reply With Quote
Old 12-25-2006, 06:06 PM   #9
emo_tactical9
Scooby Newbie
 
Member#: 135814
Join Date: Dec 2006
Chapter/Region: South East
Location: Owensboro, KY
Vehicle:
95 240sx SE
95 200sx SE-R - 84 200sx

Default

I once had my car act like it was going to die everytime it would boost just driving on the interstate. It got so bad that it did it even when still in vacuum. Thought the fuel pump was going out. I ended up adding some octane booster and chalked it up to bad gas. It hasn't done it since.
emo_tactical9 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
boost won't go over 5psi what the hell? jevera2k Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 19 05-07-2014 02:36 AM
BIG 16G install, cant boost past 5psi AntiZeroTrip Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 5 05-02-2009 12:12 PM
no boost only 5psi hooptywrx Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 25 08-09-2005 10:45 AM
Stock 04 WRX max boost 13.5psi, but..... AWDrifter21 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 11 01-20-2005 01:53 PM
HELP!Car wont get over 3800 rpm? 4CEFED6 Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 27 08-19-2002 10:23 AM

All times are GMT -4. The time now is 06:23 PM.


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.