Codes...

[B5in]

Would any of these codes be causing my boost to keep getting cut off under load? Also it only happens when I am in my 93 oct. program, not in the stock program, I am still yet to try out my 100 oct. program. I've got GIAC 3 program ecu.

some specs:
2001 2.7T
tiptronic
TBB, accordian, and all other boost hoses have been inspected & are good.


16805 - Warm Up Catalyst; Bank 1: Efficiency Below Threshold
P0421 - 35-10 - - - Intermittent

17539 - Oxygen (Lambda) Sensor; B2 S1: Internal Resistance too High
P1131 - 35-10 - - - Intermittent

17887 - Brake Boost Vacuum System: Mechanical Failure
P1479 - 008 - Implausible Signal

[rms-s4]

a boost leak most likely will give you a hard time going into boost, check for a torn ttb.

[B5in]

a boost leak most likely will give you a hard time going into boost, check for a torn ttb.

Yeah I took it off to make sure I didn't miss anything, I even took the accordian hose off to make sure that was ok, I am thinking it's an o2 sensor, but I don't wanna have to replace all 4, it seems like that's what eveyone had to do in the past

[Rajan147]

Would any of these codes be causing my boost to keep getting cut off under load? Also it only happens when I am in my 93 oct. program, not in the stock program, I am still yet to try out my 100 oct. program. I've got GIAC 3 program ecu.

some specs:
2001 2.7T
tiptronic
TBB, accordian, and all other boost hoses have been inspected & are good.


16805 - Warm Up Catalyst; Bank 1: Efficiency Below Threshold
P0421 - 35-10 - - - Intermittent

17539 - Oxygen (Lambda) Sensor; B2 S1: Internal Resistance too High
P1131 - 35-10 - - - Intermittent

17887 - Brake Boost Vacuum System: Mechanical Failure
P1479 - 008 - Implausible Signal

your oxygen sensor is driver side, pre-cat. change it out.

pressure test and check for boost leaks.

[gointoscott]

check your black plastic hose that goes from brake booster to intake.

I just tested mine and found it leaking when I did a pressure test. They are known to leak or break as they get older.

[B5in]

check your black plastic hose that goes from brake booster to intake.

I just tested mine and found it leaking when I did a pressure test. They are known to leak or break as they get older.

Do you know where to get a new hose besides the stealership?

[CONTROL ONE]

Do you know where to get a new hose besides the stealership?

www.genuineaudiparts.com

I just ordered a crapload of stuff from there last week.

[Caddy7]

What was wrong?

[B5in]

What was wrong?

Still trying to figure it out, I am hoping when I get my Vast tip-chip it will fix the problem. It was suggested that the stock TCU isn't programed to handle the increased torq. so as a fail-safe it cuts power or thinks I am in too low of a gear & downshifts.

I'll post an update when I get it situated for sure

[B5in]

As far as the above codes basically there was a vac. leak in the hose connector on the brake booster & my front driver's side o2 sensor is on it's way out