Problem with jeep after injector swap

What I have is a 89 Cherokee Laredo with a 93 HO 4.0. I did the easy swap and kept all the renix stuff on it. This last week I had to replace the exhaust manifold and while I was doing that I put on some 19lb ford injectors. This has smoothed out the idle issue I was having and has been running great. The last couple of days has been another story. When I stop at a light or something like that, it will idle down to nothin and die. Then it's really hard to start again. It has started to happen a lot more frequently now and I'm kinda stumped. I checked the cps and everything else I could think it could be. So any ideas would sure help me a lot. When it is running right, it is running awesome. Better than it ever has before. Thank you again for any help.

Just go down the list list.
1. Fuel Pressure regulator
2. Fuel pump
3. Vacuum leaks
4. Grounds, grounds, grounds
5. TPS maybe?

If none of the above, might wanna start troubleshooting electrical systems...

That's what I will start with, first thing in the morning. Thank you for the idea list to check on.