i just put in my 550's and my walbro and while on boost (8-9 psi) there is a bad rattling noise. what is that? it nvr did it before. also i just took it for a test run and my car kept stalling out when i slowed down. when i got home iit was smokey under the hood and i noticed a line blew off of the top of the turbo. coolant was everywhere and a little oil. i did my mhg and it was only smokin from the tit end where i believe a hose goes. is this the sign of a blown turbo???...