the carb is brand new, less than an hour working, fuel pressure is ok, filter is new.
it did the same with the old carb.
I have the static timing set at 5 degrees, used to have it at several places from 5 to 12, same thing. Pings with more than 5 degrees, ??? this is weird, it shouldn't ping should it?
does the same with the vaccum connected or disconnected, no difference, it's connected to a ported port anyway.
I have the idle set at 500 rpm, does the same with the idle up to 800, which is too high to engage the trans into drive.
No vaccum leaks, checked spraying starting fluid everywhere.
the vaccum reading at idle is very low 9-10 inches. I'm at 6.600 feet of altitude so I don't expect a 39 inch reading anyway, but this is too low, even gives me trouble with the transmission shifting too late.
I don't think it's a worn lobe because after a few seconds of rough idleing, it smooths out and runs very nice.
the valve guides are in pretty good shape, so are the seats, just lapped them.
thanks for helping.