reefer_bob

Symptoms: low rpm WOT leads to a big spike in boost (20 psi), back down to 10-12, and slow climb again.

Car: '01.5 6 speed, running AMS T-Box. All else stock.

I thought it was a TBB, so I pulled it off, and it's in perfect shape.

I did a pressure test, and at 10 psi the Y-Pipe to DV hose springs a large leak. I can't tell if there's any other leaks.

Where else should I look? The IC hoses look fine. I didn't hear any whooshing or anything.

The car has NEVER done anything like this before.

Thoughts?

rojodosformula::red

Could it be a bad n75??

reefer_bob

Bad N75... Hmmm... I don't know. Could it?

Funkweasel

lines to make sure they're not leaking. That can cause what you're seeing.

After you do that shoot me an email and I'll tell you what to log and all to see if something else is the problem. I assume you have no DTCs?

reefer_bob

Checking for DTC's now. My laptop batter died.

rojodosformula::red

So Troy what do you think of the idea of a mbc at 12lbs on k03's with a stock chip =) ???

Funkweasel

pre-n75 or something might be ok. You're just gonna have to chip it.

Hogothorpe

It's an M-Box, AMS said they "reprogrammed" the T-Box

rojodosformula::red

Ahhhhh that's not what I wanted to hear Troy