Cleaned MAF, IAC, No Codes

My 1998 GT stumbles under light accelertion , cruises hwy OK, idles fine.

78,000 miles
4.10s
I have that IAC plate installed

my 96 seems to stumble under slow acceleration too..like it will jump 100 rpms and sounds like its hickuping...doesnt seem like something to worry about... could be dirty maf or something I dont know...