[ol"blue]

Check for a plugged cat and/or an EGR issue. Does sound like late timing though.

 

[ol"blue]

Check for a plugged cat to diagnose a little hesitation? OK Better check the wheel bearings, too.

Believe it or not, it happened to me. Hesitation off idle, less noticable while driving. Took it to my buddy at Doug's in Mich. He replaced the cat with a straight pipe and hesitation went away. Started easier and performance increased also. No other changes made at that time, so it had to be the cat.
Later installed a hi-flow cat.
If you're going to check the WB's, check the kanoodsin valve while you're down there !!