m_wrx

hey i noticed i was driving my fully built b18c1 civic i have a percission sc61 turbo...with a tial w/g...is exhaust suppost to be comming out of this wastgate when i just rev it up and when its at idle...i had the car up on the lift the other day and i noticed this...and it doesnt built boost as fast as it used too? this just happened because yesterday is ran fine?

what do you guys suggest i should do...my a/f is perfect and i just tested for boost leak the other day and didnt find any?

m_wrx

can anyone help me?

jdm inc

iTrader: (11)

do you have the vacuum lines hooked up backwards

dpetro1

did you take anything apart? is the valve fully seated? is the fire ring missing?

there should be no exhaust at idle

m_wrx

i have not taken anything apart or did anything to it at all..i drove it 1 day it was perfect...i drove it the next day and i noticed it feels like a got a huge boost leak...and when i start getting close to 1 psi my exhaust gets way louder... so i put it up on jack stands and put my hand buy the dump tube and i felt exhaust and when we reved it up alot of exhaust came out...

i have not touched anything at all or taken any lines off of it or anything...i do have a greddy electronic boost controller in my car...but i had it tuned and i never touched anything on it after they tuned it..

connor53

if you've had the car a long time with this set up, it's prolly not seating properly. If All of the sudden one day it's doing that I wouldn't say it a vac line or anything like that. The valve prolly isn't closing all the way because of carbon build up. Take the gate off, clean the surfaces and see what happens

jdm602

maybe the diaphram ripped inside or possibly the spring collapsed? take it apart and look for yourself. its not that hard at all.

m_wrx

alright ill take it off this weekend when i get time and clean it... im just trying to get as many possible things it could be so i can try them all..i found on google the o-rings go outsome times and you have to replace them..

thanks for all your imput guys...if you have any other possible ideas let me no :-)

m_wrx

ok so i took the w/g off and the boot is not ripped and the spring is still good to go...so i put it back on and went and drove it and its still opening up at like 5 vac....could it be my greddy prof B boost controller messing up or what should i try to do?

jdm602

try just running off the wastegate. no boost controller on the line. i bet itll work fine then. boost controller is prolly messing up or something.

m_wrx

how do i disconnect the boost controller and run off just the wastegate?

teg racer 877

take the top vac line off

jdm602

connect the line from the wastegate straight to a port off the intake mani. basically just take off the boost controller. lol. not as hard as it sounds.

sleepinonacreeper

don't use the manifold as a pressure source when using both ports on the w/g. vac will open the gate. tap the comp cover on the turbo with a fitting. that will fix your problem.

m_wrx

so i need to take the vac line off the w/g and just leave it chilling there? and drive the car and see if it changes when the w/g opens? and what do you mean by tap the comp cover on the turbo?

dpetro1

i think everyone is suggesting to confirm the wastegate is working by connecting a boost only source (comp housing) to the side port, remove the EBC and leave the top port open. technically the side port should not see any vacuum just positive pressure.

if you are still having issues then there is another problem. maybe the valve isnt seating properly or you are missing the fire ring.

Jinx84

I'm thinking the spring has gotten weak, if its been on the car for a long time.

sleepinonacreeper

disconnect the vac lines to the w/g and let the car idle to see if still leaks. if it does its the gate. if it doesnt it's the source(vac). i had this happen before on a friends car. it was vac pulling the gate open because of using both ports on the gate.


this turbo has a hole beside the t logo to put the fitting in

m_wrx

well i was out there pulling the vac lines off and i happened to look over and i see some carbon build up on the top right of the exhaust manifold...so i was like wtf? i got a wrench and the bolts were super loose so i through some lock tight on them and i tightend them and hopefully that fixes that leak...im not sure if that would cause the w/g to leak or not sense the exhaust is going out beside the manifold...im going to go drive it here in about 30m and well see what happens