when i step go into boost it goes to 10 psi i have my profec b set all the way down, and i just re did all the vac lines does anyone know what it could be maybe the settings on the back of the boost controller? any suggestions would be nice thank you and also i just put a brand new tial wastegate on.

 

What lb spring is in the wastegate? Also, one of the settings on the back of the profec is for internal and external wastegate config I think... Not sure though.

 

i believe the spring is for 7 psi if not its 9 but it shouldnt be boosting over 10 psi if you know what i mean. and yea i know about the settingsjust got done trying them and it still does the same thing. any other suggestions????? thanks in advance

 

sounds like you have a 10psi spring to me....or it may be spiking a little bit. Try runing without the profec and just use the spring and see what it boosts to.

 

oh the spring is only supposed to be for 7 psi

 

i have either a 7 psi spring or a 9 psi spring so either way it shouldnt go to 10 psi you know what i mean?

 

make sure all your vaccum are all hook up correctly and no vaccum leaks and waste gate and boost controller should be tune too.

 

i have checked my vac and all leaks. so now im going to try sometihing new with my vac illl let yall know what happens.

 

That's not going to do anything. Is the boost spiking up to 10psi and going back level to 9? Or is it holding steady at 10? If it's holding steady, you've got a 10psi spring, despite what you've been told. If it's spiking, and going down, check your vaccum lines and fittings.

 

i have the same problem with mine.. the spring is set at 4 PSI.. (thats what it holds steady at without the profec).. but once i installed the profec no matter what i change it always stays at 7PSI.. i guess i can't go any lower??.. i dun no.. eirther way 7 is fine for me..

 

if it is spiking, you could have an exhaust leak in the manifold. i had one one mine. 5 lbs. spring jumps to 9 in high rpms. welded up the cracked manifold and ported the wastegate housing and steadly hold to 5 lbs. now

 

well it used to hold at 5 psi with no problem. then i built the motor and now it wont stay at 5 psi. i was told i have two much vac off one thing. let me explain where all the vac is, the bov wastegate boost controller and fmu are all on the fpr so could that be the problem????????????

 

ive done that already the manifold had a crack and i welded it

 

did you change the setting on the back of the profec with the car on or off?

 

i changed the setting in the back of the bc when the car was off. should it have been on?

 

maybe dumb questions but what port did you hook your wastegate vacuum to?

Also, do you have any check valves or anything in your vacuum lines that are preventing your wastegte from seeing positive pressure and opening (seeing boost and opening) I mention that cause I used a factory vacuum line for my wastegate from the Cruise control and it had a check valve on it that stopped my wastegate from opening, I had it set for 10psi and it spiked upt o 15. Took it off and no problem.

 

ive changed all the vac lines so i know nothings blocking it or cloging it. man i just wish i could fix it

 

try changing the setting with the car on. that what i had to do for the hks evc

 

thanks ill try that