[Mgs] Weber carb info

[Ed Woods]

List,

Well, after removing, dismantling, cleaning, reassembling, and reinstalling 
the Weber downdraft to my friend's '77 MGB, I can report no change in 
symptoms whatsoever. I found the carb to be relatively clean, with only a 
skim of rusty sediment in the float chamber.

Idle is still rough and irregular, rough enough to cause the oil pressure 
gauge to fluctuate. Steady running still experiences missing at any steady 
engine speed, parked or driving. It does appear to smooth out during 
acceleration, perhaps when the secondary is open.

Present ignition system is the new, self containing Pertronix with mating 
coil. Plugs and wiring are new. Compression is great and even. Valves are 
set. Plugs are new.

After years of sitting, enough to dry whatever was in the tank, I added 5 
gallons of fresh fuel along with a carb cleaner.

How can such a simple instrument behave this badly?

Thoughts?

Do I tell the guy to buy a new Weber? Is it the Weber? Do I spend a day 
putting a pair of SU's on this thing as a test?

TIA,

Ed Woods