boost prob.

would a realy bad valve cover gasket cause a 6lb loss of boost? what about a cracked hose from valve cover breather to turbo inlet

No on both items.

well i changed my valve cover gasket and messed it up trying to rush it back together ive had to of caused a leak somewhere mabey in the intake gasket id hate to think i screwed up more than 1 gasket i was boosting 18psi now about 12 checked hoses all seem ok as far as the i can tell.

Double check the intercooler hoses and clamps

will do much thanks. i need a quik key on my keyboard that sez thanks pete i got a feeling id be using it alot would save me alot of typing