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Old 04-24-2007, 02:38 AM   #1
thorne
Scooby Newbie
 
Member#: 130063
Join Date: Oct 2006
Location: Ohio
Vehicle:
2003 WRX
Silb

Unhappy Lean Issues

I'm running a stage 2 setup. The target AFRS all look good 10.5 on the top end. My car thinks its seeing 11.1, On the dyno it started knocking and showed a AFR of 13.5 at which point we let out of the dyno.


the maf read 180CFM in the 5k range, I cleaned the MAf its reading 195+ now but I've not made it back to the dyno yet to retest.


Any other suggestions for things to look for?
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Old 04-24-2007, 08:38 AM   #2
blkscooby
Scooby Specialist
 
Member#: 44422
Join Date: Sep 2003
Chapter/Region: SWIC
Location: Gilbert, AZ
Vehicle:
2009 G8 GT
Cammed, sprayed, stalled

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More info on your car and mods!
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Old 04-24-2007, 09:03 PM   #3
jaxscuby
Sammo Hung
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Member#: 10613
Join Date: Sep 2001
Chapter/Region: South East
Location: N Fla / S Ga
Vehicle:
2002 USDM WRX
WRB

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Originally Posted by blkscooby View Post
More info on your car and mods!
more information more assistance
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Old 04-24-2007, 10:58 PM   #4
06rexwagon
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Member#: 114730
Join Date: May 2006
Chapter/Region: SWIC
Location: Albuquerque, NM
Vehicle:
2006 WRX Limited Wag
9.8@150

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Don't know about your case but I recently got a bad tank of gas and my a/f ratio which usually shows 11:1 on my WBO2 was reading 11.9:1. At 1/4 tank I refilled at my usual station and it went back down to 11.2:1, since it's still a mix of the junk. Either that or you have a post maf pre turbo intake leak, causing unmetered air to enter the engine.
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