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Signs of Walbro going out?

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DSM_PWR

15+ Year Contributor
2,457
19
Oct 12, 2007
Austin, Texas
Mods:
rewired 255 walbro
1150 FIC
-6an fuel lines
Fuel Lab Regulator and Filter
50 Trim
DSMLink
272 cams
JM Fab SMIM

My fuel sliders are maxed out after 4k and still leans out up top around 5500 rpm. This is at 22psi on race gas. Can it be that my walbro is going out? regular driving everything seems fine, but as soon as boost starts to hit, the a/f leans out. :notgood:

I usually run e85 and noticed this problem started to develop slowly when i was running 28lbs. So i figured i didn have enough fuel pump for straight e85 and thought id try race gas but the problem still happnes.
 
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