93 Safari Stalls When Cold?!

[northof49]

My Problem : 93 Safari, 4.3L, engine code Z, starts np. After start up when it is cold, it will idle fine and then it will just stall within a couple of mins as though it ran out of gas. It is then very difficult to start up again. Now, here is where it gets strange..... I can prevent it from stalling by hitting the gas pedal as it is about to stall and if I keep the rpm's higher than idle it will keep running fine. After I do this long enough to get it to operating temp I no longer run the risk of it stalling.

I have changed the plugs, wires, distributor (wires were leaking, hoped that was the problem).
Run's like a champ except for that point, about 2-3 mins after cold start, where it will stall out...

Any idea's as to what to try next?

P.S. No engine codes came up when the diagnostic was hooked up. Engine light does not come on.

[northof49]

Just thought I would update the post as it may be usefull to anyone else having similar probs.
I will try to keep it brief and to the point.
I wasn't sure if it was and idle or temp related problem because it would stall after 3-7 mins after inital start up and no engine light. It would sometimes be hard to start it again. So, back to basics.
I checked and was getting spark, so I thought it was fuel delivery problem.
The fuel pump was turning on. Now, if sprayed fuel down the tbi, it would start and I could keep it running if I kept it above idle. I could rev it up and not have it stall, so I figured pump and filter were fine. Now, after discussing this with a friend, he suggested the ignition module. Ignition module for what seemed a fuel delivery prob? For it having a hard time starting up after stalling, ok.
So, I changed the ignition module ( after having done the plugs,cap,wires and coil days before). NO MORE PROBLEMS!!!
It appears that what was happening, was the module was breaking down when it would get warm, tell the computer that the engine was not turning over so the computer would then shut off the injectors! Then, while cranking over, it would provide spark, but was not telling the puter that the engine was turning over so the puter would not tell injectors to inject!! Now, I can only guess that it would keep running if I kept it above idle because the puter was obeying the t.p.s. and having the injectors provide fuel.
This could be vital for those having fuel delivery problems and are finding out it wasnt the pump or filter!!! I hope this helps someone else.