Poor MPG problem
#41
#42
The only other thing I can think of is if the mufflers are sucking air, even slightly, at the muffler to Y pip connection that would give the 02 sensors a leaner condition than the MAF and it would compensate by dumping fuel. That gasket is a very poor design (much prefer the thick o-ring design). I may wrap them in header tape to take that out of the equation.
Last edited by AbnMike; 03-19-2017 at 12:07 PM.
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