77 Ford Bronco Sport "chugging" intermittently

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ketchcetera

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I have a 77 Ford Bronco, rebuilt from the ground up.  Runs like a champ when it runs.  Then, basically out of the blue, it starts chugging, missing, and overall running very rough under load.  If I pull over and stop, it will idle just fine.  Based on a lot of what I read here, I replaced the ignition unit, and it ran perfectly for a day.  Then next day, the problem returned.  Fuel pump is fine.  Filter is fine.  It feels that arbitrarily my truck just stops getting fuel for some reason.  Any help would be appreciated.  

 

Bully Bob

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Hi Ketch.., welcome..!!

A coil will act as you describe.., as well as some debris floating around in the carb jet area.

The pick-up tube in the tank may have some intermitant blockage.

You didn't give us much info so mostly guessing here..,

A bad timing chain could even do this.

 
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