The Ford Barn - View Single Post - 1930 Sport Coupe 11 MPG, backfire when turned off

Dave in MN · 07-27-2020, 09:39 AM

The "bang" is likely un-burned fuel in the muffler that ignites when oxygen reaches it. You may have a small hole in the muffler or a loose connection at the muffler flange. A rich fuel mixture would contribute to the issue.
Good Day!

07-27-2020, 09:39 AM	#10
Dave in MN Senior Member Join Date: May 2010 Location: Jordan, MN Posts: 1,411	Re: 1930 Sport Coupe 11 MPG, backfire when turned off The "bang" is likely un-burned fuel in the muffler that ignites when oxygen reaches it. You may have a small hole in the muffler or a loose connection at the muffler flange. A rich fuel mixture would contribute to the issue. Good Day!