s13 sr20 gt28rs vacuum problem

[1997silvia]

i just got done installing my gt28rs and its all good except for a vacuum problem that has me befuddled , half the time it shows good vacuum and half the time it shows half the vacuum , i can tell this by the guage and by the fact that under low boost i get turbo flutter and then the blow off valve goes off which is an hks super seq , i have checked all vacuum lines and replaced them all, i dont know if i need a dedicated one but i have one going to three, one line going to my boost guage, wastegate,and blow off valve its wierd how its only half the time

any help greatly appreciated thanks

[1997silvia]

im thinking that it may have something to do with the adjustment on the wastegate?

[turboant]

im having this same problem and its driving me crazy...

[1997silvia]

any ideas turboant? i think that since my wastegate is adjustable i need more preload on the rod to the flapper while at idle or even off, i think that maybe the wastegate is staying open a little and only sometimes which is really wierd to me!!! but i dont want to keep getting turbo flutter and hurt my new turbo
any ideas???????????

[1997silvia]

ok this doesnt make any sense to me, somtimes driving down the road everything is perfectly fine i mean i boosts fine, and blows off fine, the other half of the time i get turbo flutter and then the blow off valve goes off like a second or two later?????? the wastegate i can barely move with the car off just sitting there so i dont know that it is my problem but i wont rule it out
does anyone have any idea
thanks so much

[fliprayzin240sx]

Wait whats the issue? Are you just worried about the turbo fluttering? Loosen up your BOV, plain and simple. Personally, I wouldnt T off the wastegate line, add a dedicated vacuum/boost source for it right off the piping.

[1997silvia]

smart man lol i put i dedicated line to the wastegate yesterday and its all good now