91 T-Bird 5L engine stall

This care is really fun to drive but has a has a problem with the engine dying. The engine quits for a second or two and then starts right up by itself about 15 minutes after it has been running from a cold start. This is getting dangerous on the highway. The momentary shut-off seems related to the engine warming up. I have cleaned every electrical connection I can find. The fuel pump and filter are new. Is it maybe the 02 sensor or the temp sensor? Any suggestions would be appreciated.
Doug

doug definetly change but i ve seen in the past that in ford that in first startup cold approx 4 to 11 min in alldatta it says computer

doug definetly change temp sensor but i ve seen in the past that in ford that in first startup cold approx 4 to 11 min in alldatta it says computer