I had my exhaust manifold gasket replaced a couple months ago. Ever since then my car has been better, accelerated a lot better, since I'm not losing any pressure from a blown gasket. Yet my manifold has been coming loose.... The bolts have been slowy unscrewing and my exhaust leak is back. The other day I tightened all the bolts back on it, and my acceleration was back! Yet, when I gunned it, the fuel cut would come on. Any reason for this? Also, three days ago when I tightened the bolts on my manifold, it's already loose again, and you can hear the exhaust leak when I accelerate. Would I need to buy a new manifold? New studs? I've got about 185,000 miles on my MX6-GT. Any help would be great. Thanks!