I have a 1957 292 y block that was running perfect until yesterday and is completely stock. When the motor is not running and I step on the gas pedal the carburetor opens freely 100%. When I start the motor and step on the gas pedal I can put it all the way to the floor and the carburetor will only open about 3/8 of an inch , what gives ? It`s put my ride out of commission and making me crazy !!!! PLEASE HELP, THANKS

 

Hi and welcome 57yblock, it`s always great to meet another Ford truck owner with an oldie!
For lots of info and help drop into the 1948 - 1960 F1, F100 And Larger F-Series Trucks forum: 1948 - 1960 F1, F100 And Larger F-Series Trucks - Ford Truck Enthusiasts Forums
Be sure to swing by and post your into in the local CA chapter and see what`s up in there: Western Region - Ford Truck Enthusiasts Forums
Fill out the location field in your profile soon too.