Long story short I have Option B, S3 H/E, dual pass. Had m62 on my car, drove to Kentucky and IAT2's were at about 80-85 all the way there Ambient about 70. Get my TVS put on and my IAT2's skyrocket. We think that its my IC pump so I go home and order a new one, put it on and still have high IAT2's. Was driving home today and it was 50* out and IAT2's were at 100*...like I said IC pump is working because I can see coolant flowing in and out of the Option B tank. What else could it be? Thanks in advance!

 

umm try the phenolic spacer, but I thought IAT2 of 100 was fine, when I got tuned my IAT2 was 125 and james said that was fine.

 

Did you hook up the bypass correctly? If your bypsss valve is always closed, theres your problem. Make sure your vacuum lines for the bypass are not crossed

 

^^^this. And did you figure out the problems with those codes in the other thread, was it the emmissions fuse like I said?

 

Thanks guys I'm going to check that! And yes it was the fuse, never seen a fuse blow the way it did haha it was like shattered inside. But I'm guessing it was from my o2 sensor having a open wire and hitting against metal or something

 

What am I supposed to look for with the boost bypass valve? Is it supposed to be moving at idle or something? If someone could give me so insight that would be awesome!

 

When the car is off the arm on the bypass should be pulled out
, closing the valve.

When the car is on at idle, it should be sucked in, opening the valve.

 

Make sure the top nipple on your bypass is the one connected to the TVS

 

Ok so the bypass valve works just fine. Idk what to check now. System is bled, there is no air coming out of my bleeder line for the option b. anything else to check? IAT2's are on average about 50* over ambient

 

Unbolt the option b from the passenger side strut mount and hold it as high as the hoses will let you. This will help kick start the bleeding process if there's a big air bubble. Maybe the system isn't really bled and the movement you think you're seeing is just vibrations from the engine.