Had a problem year ago or so kept trowing low boost code tried cleaning ended up replacing map sensor. Started again month ago or so cleaned it now not throwing code but not spooling quick and loosing boost. cleaned it no difference with electrical cleaner. So I disconnected it of course it throws a code and a little more black smoke but gained some boost back. So Do I need to replace it again I replaced it with cummins part but what is going on here. Do I need to go buy a new one again. Or should I just leave it unhooked??