02 Cravan, running rough

I am a missionary in Honduras. Don't speak the language well enough to get help locally. I have a 02 dodge caravan. 3.3-V6 90K miles. Just began running rough and the engine light is now on. At an idle seems to do fine. When parked, when I begin to accelerate it begins to run very rough."Missing" When driving it seems to do fine during acceleration but as soon as I let off the gas it begins to run rough.

I have had experience cleaning mass air flow sensors in the past so when I disconnected the hose from the filter bank I noticed it was not put on correctly last time the filter was changed and contaminated air was clearly mixing with the filtered air. So I cleaned the air flow sensor but no change.

I put 10 gallons of premium gas to see if a higher octane might help but still no change.

Thinking of changing the fuel filter next. Any suggestions?