When I made my last Bronco video, the Pro Flo 4 was running great! Or so I thought. When I take it out and get it up to temp and then leave it for 15-20 minutes and come back to restart, I get this horrible running condition. The AFR gets supper rich (like 10 or lower) and it coughs and backfires and makes no power. In this video I attempt to fix it and make some other unpleasant discoveries.
