Originally Posted by JustinP
I think your choke plate has one of those spring loaded flaps in it.
When the vacuum draws hard the flap opens then slams shut and that's what your hearing.
This is only a wild ass guess........ Unless I'm right.
How do I adjust that?? Also, the more I read about this it appears to be the Starter Plunger that's moving slightly...
I haven't disassembled that (yet) so maybe there's something clogged between there and the starter jet?