fuel filter is under the car in front of the rear drivers side wheel. you cant really clean it, it's a replacement job, they're not expensive
also,
checking air filter is literally a 2minute job.. take it out and give it a quick visual to see if filled with crap, replace if suspect
also could be a metering issue, get some maf cleaner and
give it a whirl
avoid messing with ETM without getting some specific advice first from someone who knows best
hard to say more without diagnostic info