03 wrx boost issue - Subaru WRX Forum
Reply
 
LinkBack Thread Tools Display Modes
#1 Old 10-09-2012, 05:00 PM
WRXtuners Member
 
Join Date: Oct 2012
Location: Minnesota
Posts: 17
jing123 is an unknown
03 wrx boost issue

so just started happen recently and seems like the turbo isnt boosting. car would lag alot right around the 2k rpm then picks up a little once it hits about 3500 rpm. Car would then hesitate to get into boost for a little bit and i have a boost gauge and its sitting very low only until about 4 to 5 psi and wouldnt go past that
jing123 is offline  
Sponsored Links
Advertisement
 
#2 Old 10-09-2012, 05:13 PM
WRXtuners Member
 
psinuse's Avatar
 
Join Date: Nov 2004
Location: Ohio
Posts: 3,005
psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to
Any odd or loud noises when it gets into boost?

Resident Grumpy Old Man(Keith)
03 SRP 2.34L
08' LGT Gears...
psinuse is offline  
#3 Old 10-21-2012, 12:47 PM
WRXtuners Member
 
Join Date: Oct 2012
Location: Minnesota
Posts: 17
jing123 is an unknown
no noise nothing no cel or anything i have this electronic boost gauge and it seems i cant get past 7 psi boost plus car feels like there no power in 25 to 33k rpms then all of a sudden boost kicks in but only to 5 to 6 psi and thats it. i've checked bcs wastegate and even checked the turbo for shaftplay and there is barely any im stumped as to what it could be and its really annoying me
jing123 is offline  
#4 Old 10-21-2012, 12:55 PM
WRXtuners Member
 
BLAZE2099's Avatar
 
Join Date: Jan 2011
Location: Pennsylvania
Posts: 2,539
Images: 6
BLAZE2099 is known to be trustworthy and helpful BLAZE2099 is known to be trustworthy and helpful
Garage
Have you had the vacuum lines off your bcs right around when you first noticed this happening?

Randy-
2002 blaze WRX- sold:(
2004 Wrx-sold
2011 Wrx limited
99 Fozz- sold
Eagle eye crew
BLAZE2099 is offline  
#5 Old 10-21-2012, 01:37 PM
WRXtuners Member
 
Join Date: Oct 2012
Location: Minnesota
Posts: 17
jing123 is an unknown
nope didnt touch anything it started happening after i changed the exhaust from a 3 in to another 3 in and just out of the blue
jing123 is offline  
#6 Old 10-21-2012, 01:38 PM
WRXtuners Member
 
Join Date: Oct 2012
Location: Minnesota
Posts: 17
jing123 is an unknown
apparently previous owner did say it had a tune or map on it could this cause the problem also?
jing123 is offline  
#7 Old 10-21-2012, 02:43 PM
WRXtuners Member
 
BLAZE2099's Avatar
 
Join Date: Jan 2011
Location: Pennsylvania
Posts: 2,539
Images: 6
BLAZE2099 is known to be trustworthy and helpful BLAZE2099 is known to be trustworthy and helpful
Garage
Carted to catless or the other way around maybe?

Randy-
2002 blaze WRX- sold:(
2004 Wrx-sold
2011 Wrx limited
99 Fozz- sold
Eagle eye crew
BLAZE2099 is offline  
#8 Old 10-21-2012, 04:09 PM
WRXtuners Member
 
psinuse's Avatar
 
Join Date: Nov 2004
Location: Ohio
Posts: 3,005
psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to
Did you change the entire exhaust from the turbo back or just the cat back? If you just changed the cat then that isn't your problem... 7psi is wastegate pressure, so I'd suspect maybe something turbo related...

Resident Grumpy Old Man(Keith)
03 SRP 2.34L
08' LGT Gears...
psinuse is offline  
#9 Old 10-21-2012, 06:36 PM
WRXtuners Member
 
BLAZE2099's Avatar
 
Join Date: Jan 2011
Location: Pennsylvania
Posts: 2,539
Images: 6
BLAZE2099 is known to be trustworthy and helpful BLAZE2099 is known to be trustworthy and helpful
Garage
I had that problem for a moment when I had my vacuums mixed up.
Psinuse is correct and we see this happen from time to time, it's just a matter of seeing what's tuned for what and what has been tinkered with usually. Sometimes it's mechanical failure tho.

Randy-
2002 blaze WRX- sold:(
2004 Wrx-sold
2011 Wrx limited
99 Fozz- sold
Eagle eye crew
BLAZE2099 is offline  
#10 Old 10-22-2012, 02:06 PM
WRXtuners Member
 
Join Date: Oct 2012
Location: Minnesota
Posts: 17
jing123 is an unknown
its all catless and i just changed from the exhaust i didnt change the downpipe and could to little or to much oil aslo affect it by chance? the turbo seems to spin fine with minimal shaft play but still might try to replace it and hopefully the helps im stumped also changed the bcs with another and that didnt chance anything. The wastegate also seemed to be good to
jing123 is offline  
#11 Old 10-22-2012, 02:36 PM
WRXtuners Member
 
psinuse's Avatar
 
Join Date: Nov 2004
Location: Ohio
Posts: 3,005
psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to psinuse is a WRX expert worth listening to
Changed you BCS? So did you go with a stock one...I know this goes against the grain, but if you can borrow a MBC try putting it on for a test drive and see if the turbo generates more boost. If not you have either a serious boost leak somewhere, might even be a tear in the intercooler pipe or your turbo has crapped itself.

Resident Grumpy Old Man(Keith)
03 SRP 2.34L
08' LGT Gears...
psinuse is offline  
#12 Old 10-22-2012, 08:35 PM
WRXtuners Member
 
Join Date: Oct 2012
Location: Minnesota
Posts: 17
jing123 is an unknown
would this cause the major stalling i also have to then?
jing123 is offline  
#13 Old 10-22-2012, 08:40 PM
WRXtuners Member
 
BLAZE2099's Avatar
 
Join Date: Jan 2011
Location: Pennsylvania
Posts: 2,539
Images: 6
BLAZE2099 is known to be trustworthy and helpful BLAZE2099 is known to be trustworthy and helpful
Garage
Can we have your full list of mods please, and yes, a tear in your piping will cause rediculous stalling.

Randy-
2002 blaze WRX- sold:(
2004 Wrx-sold
2011 Wrx limited
99 Fozz- sold
Eagle eye crew
BLAZE2099 is offline  
#14 Old 10-22-2012, 08:56 PM
WRXtuners Member
 
Join Date: Oct 2012
Location: Minnesota
Posts: 17
jing123 is an unknown
just turbo back and thats really it previous owner said there was a map thrown on but not sure or not as i've never felt the car boost past 10 psi. other than that its fully stock
jing123 is offline  
#15 Old 10-22-2012, 08:59 PM
WRXtuners Member
 
BLAZE2099's Avatar
 
Join Date: Jan 2011
Location: Pennsylvania
Posts: 2,539
Images: 6
BLAZE2099 is known to be trustworthy and helpful BLAZE2099 is known to be trustworthy and helpful
Garage
No BOV?

Randy-
2002 blaze WRX- sold:(
2004 Wrx-sold
2011 Wrx limited
99 Fozz- sold
Eagle eye crew
BLAZE2099 is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 Off
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On