A Fail/safe mode with no codes!
Don't rule out a possible fuel problem with the secondary/Jet fuel pump.
see AF
www.automotiveforums.com/vbulletin/showthread.php?t=1064333
Fuel - Fuel pressure test on both fuel pumps.
Ignition - ?
Exhaust - Catalytic converter back pressure Test
What happens when you pay for something that's not fixed?
Do you get your monies back?