Check List:
1) carburetor is in good condition, clean & properly ajusted (especially float)
2) Fuel pressure & flow (gph) checked and sat within specs
3) Ignition system checked & sat (no weak coil bad wires etc)
4) Ignition timing initial vacuum cetrifugal all checked sat @ proper idle RPM
5) Cylinder compression tested & sat (these engines have weak cyl heads prone to cracks etc)
6) No air or vacuum leaks of intake or exhaust system
7) Fuel tank drained of old fuel & in tank fuel filter inspected & sat
8) Add good clean FRESH gasoline
9) Engine should run ok
My trucks main problem was EXTRA SUPER ROTTEN YELLOW COLORED CRAP BAD ANCIENT OLD WATER & GUNK CONTAMINATED FUEL & WEAK FUEL PUMP it ran bad until those two items got fixed... I don't experience actual vapor lock but I notice the carb is receiving about 50/50 gas vapor bubbles & liquid gas...
Good Luck Fixing misosoup
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