Quote:
Originally Posted by ETAModel
I am new to the A, and got lots of advice on where to set the Gav. Also was trying to improve my mpg. When I closed the Gav too much she would backfire every time I got off the foot feed.
Sounds like you have the same problem. Try opening the Gav. And see what happens.
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The only logic I can see with this is that running too lean makes your engine run hotter. Maybe that create more opportunities for combustion in your muffler.