My TRIKE has a 1973 Karmann Ghia 1600 cc engine and just recently it started back firing, I have replace plugs, points, cap, wires and adjusted valves. If anyone can give me another suggestion please do so.
Yes, check the carb but make sure the exhaust doesn't leak. Is the engine missing if so then check or replace the carb. You can get a rebuilt one for under $100.
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More info would help, what carb is it? 30 PICT or 34 PICT-3, and what distributor do you have? What RPM /throttle position is it backfiring? It's possible you have a clogged jet, loose intake boot, or a leaking vacuum line.
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If you can make black marks from the apex of one turn to the braking point of the next, you may have enough horsepower.
1973 Karmann Ghia 1600 cc engine
