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Re: I may have figured out my detnation and lean AFR problem.....
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Originally Posted by Italian LX
Also, how high was your MAF voltage at the top of the pull? If it was anywhere near the max, then you could likely be pegging your MAF due to the colder air.
You're intake air on the dyno was likely warmer -- not only because of the general weather conditions, but also due to lack of circulation (especially if the doors are closed) -- the warmer air being less dense will register a lower voltage.
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That's what I was thinking, too. 
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1998 Mustang GT Coupe - World's Slowest Racecar
2005 Toyota 4Runner SR5 V8
2013 Volkswagen Jetta Sportwagen TDI
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