2001 Ford Cobra Starting problems

I am very frustrated. I have had my car to nothing
short of 9 shops, including 3 different ford garages
for diagnostics...no help at all. 3 years and counting.
The problem is that it sometimes does not fire up.
Sometimes. When I turn the ignition it doesn't catch,
for lack of a better term. Recently, I had the mass
air flow sensor replaced at a ford garage. 2 weeks later,
it started acting up again. I can get the car going if I
get on the gas immediately and put it in to gear, however
if it slips below 1000 rpms, the car shuts down. Sometimes
it will eventually begin to idle fine after about 3 minutes
of continuous driving. Some times it will never idle and
I go along restarting everytime I can't keep on the gas.
Other days it fires right up. It's more problematic after
it's been through wet weather.

Thank you for reading and any potential insight.