I have a 1980 Bronco and was driving the other day and the truck was still running but the gas pedal wouldnt work momentarily. i put a new carb on begining of december and its a manual trans truck. it has done this 3 times in 2 days but i dont know why can anyone help?

 

I would say either the linkage is worn out and binding up or you may have got something out of alinement when you replaced the carb, again causing a bind. Or I have seen a linkage freeze, depending on how cold it is where you live. My mother's car suffers from the last one. I would first check the linkage, 30 years of wear can kill about anything.

 

The linkage is a snap-clip type and cant be put on wrong. its a 300 L6 and i see no way it could have binded. and its been warm(42F) the last week when it happened.

do you think i might have a defective carb? with bad linkage internal?

 

42f is not warm enough. If it does it worse during damp foggy mornings, I bet the carb is freezing up. The vaporization of the fuel and the venturi effect inside the carb, make it run much cooler than the 42f air coming into the aircleaner.

Usually hooking the warm air tube back up to the aircleaner from the exhaust manifold, and making sure the control door in the snorkel is working fixes it.

 

it just started doing this randomly. the motor was warm and I've been driving fords with the same setup for the last 5 years and around 100k miles and havent had this problem before. ive had this truck 2 years and this is the first time its done this.

 

Here's my take, and I think that sentence is key. When you replaced the carb, you damaged the plastic guide sleeve on the throttle cable and now it's binding, sometimes… I had the same problem when a friend helped me re-install the intake on my 6cyl. He bent the spring area of the throttle cable and I heard it crack. Not really his fault, the plastic gets pretty brittle over time. I didn't think anything of it but man what a surprise when I experienced a gas pedal that was stiffer than the power brakes without the engine running. It did it twice and I had enough of that! I ended up buying a new cable from Ford, I think it was like $45 back in '03. Look closely at the plastic sleeve under the spring at the carb end of your cable; sounds like you've got the same issue I had.