ok.. i posted erlier about loosing boost well i cant find it hears the low down 86 gn red 93(no boost control in chip) fuel reg. set at 46,xp pump, exaust, not much else, i started loosing boost ,,thought it migh be my cracked driver side headr, I replaced it no difference ( but runs good )but soon as i replaced valve springs 2 days ago I lost alot ..I have the aistgate adj. where it should be for 21 psi and it gets 17..when its cold it will spike to 20 then drop off to 18 then to17.. then the next time(after it warms up a little itdosent spike so much ... ds shows no knocks no retard... o2 are ok... looked at the hoses and retightend all are good checked vacume lines to waistgate sil. and put wire ties on them and replaced waistgate silonoid... I have not checked actuater yet ,,, but i thought i would get some opinions 1st...sorry for the long post ....ttnx for your help