1997 Dodge Caravan Error Codes P0340, P0352, P1391

Electrical problem
1997 Dodge Caravan V6 Two Wheel Drive Automatic 160000 miles

I have a 97 dodge caravan 3.3 engine. It ran just fine, once in a while I would have a gas smell, when I started the car. Then one day, after driving it to a couple stores. Went home, turned it off, then decided to move it. It would not start. Then after a couple of hours it started with the check engine light on. It read code p0340 intermittent loss to cam sensor. Change the cam sensor, it ran just fine. Then next day it would not start, when it did it just sputtered. Change the crankshaft sensor. Ran fine. Then next morning it started fine, went in for a couple minutes came back out and the car died. Same problem will not start, when it does it sputters. Codes are now, p0352 and p1391. Checked the coil it seems fine, and other things and I am stuck where to go now. It seemed like the pcm was sending to the coil. Can you help?