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10,536 Posts
Rusty beat me.
Thinking about what can happen when things get hot. Valve clearances can close, causing a drop in compression.
The carburetor can get too hot, and the fuel does not vaporize correctly.
Early push rod Volvo and some British cars had that problem. 1/4" spaces helped.
Does the fuel pump push fuel up? Or is it a vacuum to suck the fuel from the tank. If it is a vacuum, fuel should flow in the prime position. If it is a pump, check for fuel flow while cranking. then check for spark, and check compression. Some coils fail when hot. Sometimes you have spark when testing, but not enough spark when the plug is in the hole. Open the plug gap to 50 thou, or cut off the tip, and check for spark.
Bon chance. UK
Thinking about what can happen when things get hot. Valve clearances can close, causing a drop in compression.
The carburetor can get too hot, and the fuel does not vaporize correctly.
Early push rod Volvo and some British cars had that problem. 1/4" spaces helped.
Does the fuel pump push fuel up? Or is it a vacuum to suck the fuel from the tank. If it is a vacuum, fuel should flow in the prime position. If it is a pump, check for fuel flow while cranking. then check for spark, and check compression. Some coils fail when hot. Sometimes you have spark when testing, but not enough spark when the plug is in the hole. Open the plug gap to 50 thou, or cut off the tip, and check for spark.
Bon chance. UK