Quote Originally Posted by WR6133 View Post
I would have thought if valve related you would have noticed other symptoms earlier.

I know F all about FI but if the lines/breather/etc is all good then that would be the next logical step.

Is the fuel pump operating properly?
When the ignition is turned on the pump primes as it always has , and I've been in the garage today blowing down the breather hose and it seems to be obstruction free .