1991 Honda Accord car stalls

About a month and a half ago I started having this problem. After driving the car around for a while the idle would jump up and down while I stopped and eventually it would stall. It would not start again for a period of time, sometimes hours. I took it to a mechanic and they let my car sit for a day then looked at it and of course it ran fine then. They told me they thought it was the distributor from the sounds of it. I drove it for almost a week and then it did it again. I bought a distributor and put it on. Car ran fine (except for the idle would jump between 1000 and 1500 rpms when I would put it back in park after I reached my destination) for a little over a week. Then it did the same thing except that the idle would jump more when I was driving than when I was stopped at a light and would stall. I check the cap and rotor and they were kinda fried so I replace them and it again ran fine for a little over a week (same idle jumping after driving and putting it into park) and now is stalling on me again. So it seems like the problems start when the engine gets hot. I talked to different mechanic and he told me that he thinks it is the mudule in the distributor, but the new distributor came with a new module. It had the same problem with old distibutor and new one. Any ideas?