happening on my ix mr se also. cold weather totally messing with me...when its warm its fine...when its cold its brutal.

 

Either WGA is not getting air signal to close for some reason or WGA diaghram is ruptured or linkage to WG binding

You should be able to the WGA to extend with 10psi applied directly to nipple. Try that and if that works the EBC or tubing is bad.

With pneumatic boost control, esp with EBC, the change of weather shouldn't make any more than 4 - 5 psi of boost, unless you were in death valley and drive to Alaska

 

i have new lines, tested with a functioning mbc.... so its something else

if its teh wastegate would i still be able to run 11 pounds when i loop the turbo to the wastegate?

 

Yeah, it could be that you stock WG solenoid is wimpy. You might be better off with a Forge WGA with the red spring.

If you're gonna test for base WG pressure, then you should start at square one. First you must remove all preload by adjusting the actuator rod to where the turnbuckle freely slides on and off of the flapper valve pivot arm. Once you've done that, then you can verify base WG pressure by looping a hose from the turbo's compressor discharge nipple to the WG solenoid nipple.

 

try this:
(assuming you have a ball and spring MBC)
take the manual boost controller.

-unscrew the bottom port of the MBC and removed the ball and spring. replace bottom port. (if MBC is assembled differently, do what needs to be done to remove the ball and spring)

-hook up the turbo outlet nipple to the bottom port on the MBC with a vacuum line. ziptie both ends.

-take the side port of the MBC and hook it to the wastegate actuator. ziptie both ends.

-run car and see where boost goes. it should be the base wastegate pressure. if not, you have a bad vacuum line.

-if you get wastegate pressure, re install spring and ball, and unscrew MBC adjustment knob out as far as it will go (without the knob falling off). try boost pressure again.

-you should still get wategate pressure. if not the MBC is faulty. if you do get wastegate pressure, slowly turn in the adjustment knob of the MBC until you get the boost pressure you want.



if you do not have a ball/spring type
-repeat all of the steps above except there will be no ball and spring.
-if it is a bleeder type MBC, you still need the adjustment knob all the way out

 

Sounds like you have a bad actuator....stock or FORGE?

 

its definetly not the mbc or ebc... i tested them on a different car this morning and have no problems.


i have the stock wastegate.



another thing i noticed this morning while i was idleing at a light.. my afr's bounce around from 11.5's to 18.5's back and forth in a sweeping motion.

im sure that has something to do with it

 

boost leak test it...