99 Odyssey dies and/or wont start!

Fairly new to the forums but I have done some searching and do not see anything similar to my problem so here goes.

Shortly after I bought this van less than a year ago I started having intermittent issues with it starting. Totally random it would just crank and not start. The problem progressed to the point where it would even die while going down the freeway, and then come back on and keep going as if nothing happened. This was truely wierd. Going down the freeway at 55 to 65 and the dash lights would come on and I lost power and sart slowing down. Then a few seconds, up to 5 seconds, later it would all go back to normal and I would keep driving. I did not even have to restart the van as it retarted as well. I found that these vans had a recall for the ignition. This was for a wire harness that goes to the ignition switch and not the switch itself. It had already been done on this van it a past life but the symptoms exactly matched the recall issue so I replaced it. This fixed the issue completely for 3 or 4 months.

The issue I now have is somewhat similar. The van starts and drives normally. I drive to the store, shut off the van, and go inside. I come out maybe 10 min later and the van just cranks and will not even try to start.

I have tried different keys, wiggling the key, switching on and off, taking the key out and trying again. The only thing that is consistent is that it takes in the neighborhood of 5 min to get it to start again. It was also very inconsistent. You never know if it will start or not. Most of the time it will start just fine.

Now the problem is getting worse. On the way home from church Sunday just driving along it just died and would not restart. Same as if I had shut it off. All the dash lights came on and I coasted to the side of the road. After about 5 min it started just fine. I drove another 3 miles and it died again just as I got home.

I searched in my Honda repair manual and decided it was likely the Immobilizer receiver unit. I went and spoke with the dealer but that was no help. They had the part for $60 so I got one and installed it. That was cheaper than the $100 they wanted to start looking at it.

I installed the part but the next day it was doing the same thing again. Lucky for me the part is returnable because it was an open part that they sold me and they said I could return it if it did not fix the problem.

But I do not know what the problem is.

The Immobilizer system reads the code in the ignition key. There is a green "key" light on the dash. When you turn on the key, this light comes on for two seconds and then goes off if everything is working properly. If it does not detect the proper code in the key this light will start flashing until the key is removed. When you turn off your key, the light flashes about 5 times then goes out.

When everything is working on my van this light shows everything is fine. When the van shuts off or will not start, this green light does not come on at all. Either when you turn the key on or off. This is why I replaced the immobilizer receiver.

I have never seen a check engine light. I assume this means the bulb is out. Part of the troubleshooting in the manual says that the PCM is the next place to go.

Any help would be greatly appreciated.

Thanks for your help.

After doing some more searching I managed to find some similar posts but no definitive answers. Looks like possibly the ignition switch that is only few months old or some other undertirmined cause. The PCM is not listed as having been tried for fixing this issue.