I run the weber 38 DCD carb, and I had this kind of backfire through the carb because the most lean idle/air was set too rich. My plugs also used to foul within 100 odd miles.
Once I sorted this out, the truck is running very well, and quite fuel efficient, with zero in carb backfires.
What do the spark plugs look like?
Also another note, I'm running 8* BTDC - Dont know if this might have a bigger impact.
Last stupid question, firing order is correct?
_________________ 1975 Luv 1.6L Stocker (G161) - 4 Speed Manual
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