*URGENT* 2001 Prism 1.3L Stumbles off idle and no DTC's!! HELP!!!

I have a 2001 Prism with 126,000 miles and I am having a hesitation or stumble just off of idle. I am not showing any Diagnostic trouble codes. The plugs are new but they are not iridium as specified on the cam cover. The MAF was very dirty and has been cleaned.

Does anyone have any idea where I should go next?

It's a 1.8L... my bad. Would the cat being clogged be a possibility.

I recently replaced the spark plugs and wires on my 1999 Prizm, which cleared up my sputtering issue.

try some injector cleaner