Well I have 2002 5 speed I just changed the exhaust manifold and gasket and it still sounds like i have A leak. I checked it when it was running and can't feel a thing. Sprayed carb cleaner and noting changed did all the tricks to try and get the rpms to jump and noting. Is there any thing else that can cause the problem? My next step is to change the intake gaskets? I'm used to having v8s so the v6 is new to me. I have searched the forums and can't seem to find any thing. Any ideas or thoughts would help. Thanks.