> My engine of my Opel ('(78) started backfiring in the carb.
> I checked ignition timing, valve timing, cleaned the carb. But nothing
> seems to work. At idle the engine sounds good, but at higher revs the
> backfiring starts.
> Who has an idea?
You could very well have a flat exhaust cam lobe. Take off
the valve cover and turn the engine over. Make sure that all
the rocker arms are moving approximately the same amount.
I think you will probably find that one is not moving at
all
mickster
