1986 ford f-150 stalls when slowing down.

Question

Sometimes when I turn corners or slow down my RPMs drop

and then truck cuts off. Sometimes if I slow down easy it will drop but come back up, but it it's a quick stop it cuts off. Runs fine sitting still or running down the street.

Answer 1

  I'm guessing it has a 300 inline six with CFI and aprox 150000 miles on it.And if you've tried 2- FOOTING it ,,, it will keep running. Your throttle body is dirty and /or your air bypass valve is stuck.It has two wires going to it ,,,its on the throttle body,,, and looks like a solinoid. I'd try cleaning the throttle body first,,,then changing the valve

Answer 2

Sounds like a fuel problem. Perhaps you need to replace your gas tank. But start with the simple stuff like fuel filter and fuel pump. Work your way up to the tank.