Not that I don't trust most mechanics to preform the KOEO (key on engine off) & KOER (key on engine running) scans correctly but......OK, I don't!
I would do the scans manually as directed at the top of the page, or buy a $22. code reader w/ digital display. Need to do the KOEO first, & most mechanics don't even do it at all. They go right to the KOER. Big mistake! http://www.handsontools.com/Equus-In...ol_p_5574.html
We really need the actual code #'s & which scan they appear in. And if their a continuous memory code, or an active code, or both.
t will probably end up being either a compromised sensor wire to or from the MAP sensor if I had to guess. You can check that separately.http://www.fordfuelinjection.com/?p=27
What happens when you disconnect the connection to it (not the vac, just the wire connection)? No change? Check input voltage.