Sudden Problem car wont run

[cyrus]

I'm on vacation in florida. I hadn't driven the car in about 4 days. Went to go start it, turned on the a/c to cool it off. Car ran fine for about 20 seconds and then all of a sudden it trys to die, then idles really low/rich. I notice the scanmaster is off and the check engine light is on. The a/c compressor also clicked off. The fuel pressure was still holding at 40psi or so on the gauge. First thing i think is ecu? I checked all the fuses. all are good. Anyone have any ideas? Im at a loss.

 

[granatl]

Likely the MAF or Oxygen sensor. Scanmaster numbers (especially the trouble code) would help.