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Discussion Starter #1
i have a 2002 wrx.with the 2.5 block. i have 820cc injectors with a flashed ecu. i am getting a code bank 1 is running lead.any idea of what i need to do to to fix this problem .thanks
 

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In Memoriam
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3,733 Posts
In order:

-dirty maf
-post-maf vacuum leak
-piss poor tune
-bad o2 sensor


who tuned it? When was the last time it didn't have this code?
 

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32 Posts
Discussion Starter #3
altenator connection was loose

the positive connection was loose.so i cleared the code and tighten the altenator connection.for the moment the check engine light is off. tomorrow i will see if it comes back.and will also check foe leaks.
 

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Super Moderator (Actually a SuperSpy)
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29,233 Posts
P0171 may not come back immediately. The car will have to cycle and you'll have to be under vacuum if memory serves. It may be a while.
 

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15,697 Posts
Or any leak in the intake between the MAF and turbo.
 
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