Well, came home, cleared codes by removing negative cable of Battery.
( I wish I had not), I started engine and let it run for half hour.
No noticeable problems. I wish I ahd checked codes before clearing, maybe the MAP sensor code or whatever the problem was would have shown up in codes. Now, codes are good because corrected problem
turned off engine and did code check, I get 12 three times, four times, five times, etc.............. I get 12 continuosly.
So I took for test drive, hard test drive, pedal to metal kinda test drive for 15 miles. Runs great! No hesitation, no cut off at stops, perfect.
I am hoping that discovering MAP sensor connection was fix to problem.
Of course Murphys law may prevail and get me about 300 miles from home
But I hope not. The problem did come on kinda suddenly. I did not have any problems on any prior trips. I did change some plug wires and check fluids etc.. before hitting road this time, maybe I knocked connection loose and did not know it.