1986 Ford Bronco running bad

1986 FORD BRONCO
87,000 MILES • 6 CYL • 4WD • MANUAL
Avatar
CONNORS13
  • MEMBER
  • 2 POSTS
just bought a 86 ford bronco as a project truck. The guy sold it cheap because it won't pass smog. he has replaced just about all the smog junk inc the carb. Truck ran good and strong just not passing smog inspection. he was told it was the carb. he replaced the carb and now the truck won't stay running. any tricks to this way small carb on the basic strait six?
Feb 5, 2010 at 12:14 PM
Advertisement
Avatar
RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
Won't pass smog -what is it failing on?
Feb 5, 2010 at 12:17 PM
Avatar
CONNORS13
  • MEMBER
  • 2 POSTS
the owner wasn't sure . high reading on co he thinks. not a lot of info given....
Feb 5, 2010 at 12:25 PM
Advertisement
Avatar
RASMATAZ
  • CERTIFIED EXPERT
  • 75,992 POSTS
High CO carbon monoxide failures indicate an overly rich fuel mixture. On older carbureted engines without electronic feedback controls, look for things like a stuck choke, misadjusted or fuel saturated float or a rich idle mixture adjustment. On newer vehicles with electronic carburetors or fuel injection, the system may not be going into closed loop because of a bad coolant or oxygen sensor.
Feb 5, 2010 at 12:30 PM