haha sounds spot on like a vacuum leak on a CIS car...but if you are absolutely positive i guess i have no choice but to take your word for it
the alan key is dirt cheap, about $3 at your local hardware store lol...but im not sure that A/F is the issue, what is happening when it cuts out? just driving along and it dies? or wont stay running? hows the idle? what RPM is it idling at?
and i know you are posssssssssssitive but check the intake boots thuroughly for intake leaks...any cracks or anything...and its toast