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Old 01-21-2013, 08:36 PM   #1
ehiddenidentity01
Scooby Newbie
 
Member#: 279169
Join Date: Apr 2011
Location: marysville oh
Vehicle:
2004 impreza wrx sti
wrb

Default 04 sti leaning out

04 sti leaning out with any kind of boost bad. fuel pump is good fue pressure regulator good no leaks. runs fine in closed lood but when it goes to open lood it just gets stupid lean. thinking fuel pump controll unit. any thoughts?

20g
850cc injectors
walbro 255
ewg

happened all of a suddon
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Old 01-21-2013, 09:08 PM   #2
AuthenticAMD
Scooby Newbie
 
Member#: 212239
Join Date: May 2009
Chapter/Region: MAIC
Location: Baltimore, MD
Vehicle:
2008 Legacy Spec B
QSM (stage 3.5)

Default

Not very descriptive. Are you tuned? If not then that is why it's leaning out. Could be post MAF leak causing you to lean out as well.
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Old 01-21-2013, 09:44 PM   #3
jaxscuby
Sammo Hung
Moderator
 
Member#: 10613
Join Date: Sep 2001
Chapter/Region: South East
Location: S Ga / Hell Rock
Vehicle:
2002 USDM WRX
WRB

Default

could you list when the parts were installed?
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