Well heres the deal. I have a problem with my boost spiking all the sudden. It never used to do it, but now i guess it does. I have a gt40 302 with canfield heads and mpt70 3"cold side with intercooler and 3" hotside, also a 38mm wastgate mounted were the two hotside pipes merge. Wastegate also has a 10lb spring in it. Now the problem. All summer long it would boost ta 10lb and stay there, now it will boost to 10lb till about 4800rpms and then climb till I lift. By 5500rpms Im up to 15lb and havnt gone anyfarther. The only thing ive changed was I put a new fuel pressure regulater on and some fuel rails. Nothing to do with the turbo? Does it sound like mabey the wastgate is going bad? Thanks guys.....