Car shaking and would not Move

I have a 2000 jeep cherokee, a few wks back my car really shook alot then went away, the other day the whole car was shaking and when I went to put my foot on the gas pedal it would move it was bucking and bucking, I only had to make it a few blocks to go home so I tried, after a few minute of this she finally rode smoothly, my husband is pretty knowledgable and can fix basic things in the car he naturally took it out for a ride its been fine since then, he thinks something might have clogged the gas line. Prob should get a tune up what do you think