EGR Valve and O2 sensors!!PLEASE HELP

[parax]

1. Where would the EGR valve be in my 94 explorer. What does it look like.

2. Where can I locate the O2 sensors.

My problem is that during idle, the engine misfires and sometimes stops. I tried the MAF but did not work.

When I remove the MAF connection the prblem is solved. Any ideas please!!!

 

[Majisto]

Ok, I just got a 0442 code earlier for an evaporation leak, and it is part of the EGR system. The valve itself is a round little object on the front of the engine (At least on the SOHC it is), and the O2s should be down in front of the catalytic converters.