engine chugs upon restart after long drive, is it a maf or crank sensor? on 1996 Buick Regal

engine starts and runs good when cold but after about an hour or more of drive time it WILL (upon restarting) run rough, chug, almost likes it out of fuel. it only does this when its at normal operating temps.

Asked by for the 1996 Buick Regal
have car scanned for codes at auto zone for free and post so we an adv