Coughing After Warming Up

Posted by stajgr On 2024/6/22 7:16:09
Greetings to everyone, I am asking for help from more experienced colleagues. I have a 1953 Packard Clipper, 288 cu.i. engine, two-barrel Carter WGD carburetor.
After driving 2-3 miles, probably after warming up, the engine starts "coughing" and "backfiring." It's as if it's not getting enough fuel. The engine loses power. After starting, when the engine is still cold, everything works normally. The pump provides enough fuel, see the picture of the fuel bowl. (When I disconnected the fuel supply hose to the carburetor and cranked the engine, fuel flowed normally from the pump hose). I think the problem is in the carburetor. I tried to adjust it according to the manual, but something is probably wrong. The mixture richness screws are opened 2.5 turns. Can anyone advise me?
Thank you.
Stajgr


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