check the crank sencer

Hmmm; I had a similar problem with a Ford van in the late 80's; driving down the highway or such, it would just die, then start right back up, but it might not do it again for some time. It turned out to be the electronic ignition module. You said you changed the coil pack, but I wonder if that includes the electronic ignition module.

After about 10mins it goes form open loop to closed loop. Open loop mean it runs from the VE tables to work out the amount of fuel to put in. When the car is warming up it will go into closed loop could be around 120degF Engine Coolant Temperature, Closed loop reads the oxygen sensors and feeds back to the ECU this then adjust fuel trims. If an oxygen sensor wire is damaged it could dump in loads of fuel or take fuel away. Therefore making your car die. Starting the car back up starts in open loop again for a short period of time. If you start the car again how long does it run for? The car learns fuel trims and can add or subtract 25% fuel. Maybe just letting it relearn may sure the problem if its not a sensor. Really you could do with someone to plug in a diagnostic program to get to the bottom of it. It may be nothing to do with fueling/oxygen sensors. I had an '89 Firebird, and when I closed the hood with the car running it would stumble, it came down to being the MAF sensor, every time I tapped the MAF the car would stumble. Try tapping the MAF with the car running. Its got some very fine wires inside that could be damaged. Good luck.