dropping a cylinder

["Wm. Nick Leppert" <nleppert@domain.elided>]

re: V8 #337 rough idle
Nick, my first thought is a cracked exhaust valve. When open the exhaust
valves are visible through the spark plug holes, and can be rotated with a
screwdriver (remember to be gentle on the spark plug hole threads with the
shaft of the screwdriver). Usually the valve will lose a chunk, but sometimes
they hang in there for a while with just a crack. I would also check the
cap/rotor, wires and plugs, and after that the valve clearances if things
still aren't making sense. On a Spica car there would also be the bad injector
possibility....My money is on cylinder #3. Good luck, Nick

>My 1971 Giulia 1300 Super has all the good bits from a 1975 2000 Berlina
>(engine, gearbox, axle etc). It has developed a rough idle, flat spot at
>about 2000 and the ability to foul plugs at will...It's been a long time so I
cannot remember the exact figures but one
>cylinder has much lower compression than the others. The thing I don't
>understand is that the low compression seems to only exist at low revs.
>Above 2000, it is fine.

--
to be removed from alfa, see /bin/digest-subs.cgi
or email "unsubscribe alfa" to majordomo@domain.elided