Egnine hesitates

93 Caravan, 3.0L

I was away (business travel) for about 4 weeks and the van was parked for most of the time. Wife took it out once or twice during that time for short trips.

As soon as I came back, I noticed that the engine hesitates when I first start moving from a full stop. It does it up to about 60 kph (~40mph). If I step on the gas, it goes no problem. On the higway, it's also behaving properly. The idle is a little bit rougher but nothing bad.

I added gas twice, so I assume that the gas is not the cause. Yesterday, I sprayed some carb cleaner in the air intake. It seemed to help a little but it's not back to what it used to be.

The spark wires are new (6 months). Distributor cap is new (6 months). Air filter is clean. Gas filter was also changed 6 months ago. Injectors were cleaned 6 months ago

I will check the spark plugs and also check the engine code.

If it was the fuel pump, would the problem be mostly at high speed?
Could it be the MAPS sensor.

Is there anything I should look for?

Thanks

Seb

EGR could be sticking open a bit.