Bought vehicle used, has had a history of.

Bought vehicle used, has had a history of randomly not starting, would have to wait a few minutes finally would start. Same thing recently except for the computer was displaying "reduced power". Autozone tested, codes were TPS related, I replaced the throttle body, same as it ever was. Had my wife try to start vehicle while I jiggled the connecter to the map sensor, bingo, vehicle started right up. Still displaying reduced power. I have to repeat this process to start vehicle. My question is : could the map sensor or the connecter to the map sensor be the culprets for the not start as well as the reduced power problems.
thank you,
michael L.