Cherokee loses breath
 

Guys, I have almost same problem like in similar post here around only my is
without noise. In fact, when engine comes to 2200 (under load not in idle)or
a
little bit more, it just "losses breath". Looks like fuel pressure drops one
moment. I wait few moments with a throttle down and after it accelerates
normaly. Why this hesitating occurs? Engine has new spark plugs (Splitfire),
before I had Bosch Platinum but it was same. New distributor cap was
installed and set of spark plug wires. Air filter is also brand new.
Fuel filter has about 5000 - 6000 kilometers.
Many greetings from Croatia.
Thanks.