Truck runs rough on acceleration after it sets for more than a day. Changed plugs, wires, distributer and rotor, 02 sensors, mass air flow sensor, and crank sensor. Still no fix

What is your question?

Problem is intermittent. Truck will backfire and have a rough acceleration mostly out of first gear. After it has been driven for a while, truck will run normal. Runs rough mostly after setting for more than a day.

What makes this problem better or worse?

It's worse after setting for more than a day

How long has your 2001 GMC Sonoma had this problem?

Over a year