It does list a FRONT expansion valve on a dual air system for this. Not strong in Chrysler products and info isn't always correct available to me.
Copied from an auto parts retailer..........
Everco A/C Expansion Valve
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Part Number: 38002
Warranty: 1 YR
Notes: Front unit
Not very sure but should be able to simply run front only and tell if there is a failure of front only or not. Feel lines for temps or use an IR thermometer,
Hey - if this vehicle isn't running properly as described "misfiring" why is A/C involved? Get code readings which should be able to put out a code # indicating which cylinder or multiple misfires. Do keep in mind codes tell you the circuit with a problem not what the problem is or a part to replace.......