I have a great little VW rust free pickup that has got me really frustrated. It was converted to carburator and was running GREAT! Then it started to chug and eventually it would not run. Then I'd shut it off and it would run again for a few miles and then start up again doing the chug thing. I replaced filter, wires, coil, ignition module and still nothing. Then I replaced the distributor and it ran great again for about 25 miles and then started doing the same thing again. It's grounded right to the transmission so that's not it. The coil gets pretty hot but don't know what could cause it. I'm desperate and am out of money and need to use this car to get around. PLEASE HELP!