91 seville intermitted stalling no crank

[steveo]

hi everyone i bought a 91 seville stolen recovery stering colum busted underneth doorlock missing. car starts runs fine sometimes.i cansometimes drive 50 miles with no problems.then it will just die i coast to side of road. when i turn the key no crank no clicks nothing info center on dash says system problem.i have to let it set for awhile then it fires right up runs like new untill next time it decides to quit.i checked codes iget cam possiton senser prob, ecm losing contact with bcm. any thoughts thanks in advanse steveo