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Checked all vac lines, had a code p0421, found out the exhaust manifold bolts were backing out So replaced gasket and all hardware..... new Bpv, wastegate seems fine, can't blow into it ya know. Gonna redo all the chargeable connections just to be safe and update. The weird part is no cel...

That's what I keep going back to, but I've tried pile checked all vacuum lines, at least that I know of. What are the common spots for vacuum leaks on the cars?

Currently checking exhaust manifold and gasket. ... no leaks found so far, but about to smoke it.

Ok guys I'm new to the site, and relatively new to msp's. I've got an 03.5 msp, only mods are cai, samco upper intercooler hose, aluminum intercooler (stock location), and 3in. Turbo back exhaust. I'm having an issue, where after I've had it in boost it wants to idle really rough. Also...

Looking to buy the bypass valve. Pm me