[Ecky]

As title states.

Recently (2 weeks or so) my car has started to hesitate when cruising and when shifting early, such as putting it in 5th at 25mph (just under 1500rpm). I don't notice a hesitation when the engine is more highly loaded and at higher rpm and it still idles fine.

Sometimes when engine braking the fuel doesn't stay cut off, it occasionally fires a few times.

I don't have any engine codes, and it sounds fine even when hesitating, I don't hear predetonation.

Temperatures aren't unreasonably cold here in Florida right now and I haven't done anything under the hood lately other than tighten some bolts in the suspension.

I put in new plugs and wires about a year ago, I want to say they were "30k mile" plugs and I'm at less than half of that right now. The distributor is less than a year old and still looks like it was just pulled out of the box. My O2 sensor's age is unknown but I've had the car for 2 years and out about 35k mills on it. Gas mileage is fine overall. I recently set a trip record but my tank averages seem a bit low lately.

I'm considering putting some fuel system cleaner in with the next tank in case the injectors are dirty, and changing the plugs. What else should I check?