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Old 04-13-2015, 04:17 PM   #4 (permalink)
2000mc
herp derp Apprentice
 
Join Date: Oct 2008
Location: Lawrence, KS
Posts: 1,049

Saturn-sold - '99 saturn sc1
Team Saturn
90 day: 28.28 mpg (US)

Yukon - '03 GMC Yukon Denali
90 day: 13.74 mpg (US)
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If you're getting a lean stumble around half throttle I think I'd bring the needle back up a step, and then re evaluate. Might then be able to drop the main down a size or 2. Did you move the needle before the exhaust mod? If so, maybe now returning to stock jetting with the exhaust mod, would leave you running as lean as dropping the needle before the exhaust work
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