low boost

[GeorgiaBoy]

has anybody had a problem with car spark rattling and wont build but 7 pounds of boost

 

[garyk1970]

be very carefull,detonation will blow a head gasket.if you hear "knock"let of gas immediately.get a scanmaster tool and give us your numbers.start checking your fuel system ie; pump,filter,etc. keep us posted. where in ga are you?