Audi 1, Me 0

**pit viper** · 11-13-2008 07:39 AM

And the fight begins...

So, after getting my driveshaft cv joints replaced, the car was running smooth so I floored it on the way home. started accelerating hard, then felt like it hit a wall. Had to limp it home, ended up discovering one of the pipes blown out of the tbb.

Put the pipe back in, and the car seems to be running good. On the way to work yesterday, ended up next to a co-worker of mine who has a nice Caddy, and he decides to race ahead. I hit the gas, and the car stumbled, so I let off. Find out if I try to accelerate more than real lightly, the car has no power at all.

I figured this was a good time to try out my new Vag-com. I have no CEL showing, but I hook up the vag and do a scan. I get the following:

Address 01 -------------------------------------------------------
Controller: 8D0 907 551 A
Component: 2.7l V6/5VT G02 0003
Coding: 06611
Shop #: WSC 06325
10 Faults Found:
17947 - Clutch Pedal Switch (F36): Implausible Signal
P1539 - 35-00 - -
17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High
P1113 - 35-10 - - - Intermittent
17833 - EVAP Purge Valve (N80): Short to Ground
P1425 - 35-10 - - - Intermittent
17880 - EVAP Leak Detection Pump: Short Circuit to Ground
P1472 - 35-10 - - - Intermittent
17938 - Camshshaft Timing Adjustment: Short to Ground
P1530 - 35-10 - - - Intermittent
17955 - Boost Pressure Regulation Valve (N75): Short to Ground
P1547 - 35-10 - - - Intermittent
17697 - Boost Pressure Control Valve (N249): Short to Ground
P1289 - 35-10 - - - Intermittent
17529 - Oxygen (Lambda) Sensor Heating Circuit: B2 S2: Short to Ground
P1121 - 35-10 - - - Intermittent
17525 - Oxygen (Lambda) Sensor Heating Circuit: B1 S2: Short to Ground
P1117 - 35-10 - - - Intermittent
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-00

That's a lot of "Short to Ground"s.

**audidub0490** · 11-13-2008 05:59 PM

my guess is that when you blew off that pipe the car wasnt seeing what it was supposed to and the ECU went stupid.. thinking its not getting what it wants. try and reset the ECU or erase the codes set it back to where it was(my rado dis con the batt wait 30 min and wiped clean) but idk about audi and the new ones. i think the ECU just has to relearn itself. but as far as anytthing else i have no clue plus they are only intermittent

**Daft** · 11-13-2008 06:19 PM

Alot of those are residual codes from the past owner. Clean them out and then check the codes again to see what come back. Then we'll have a place to start from.

**Stampy** · 11-13-2008 09:38 PM

yeah I would erase them and see what comes back. The EVAP ones are kind of common, and if they remain are usually an easy fix.

**pit viper** · 11-14-2008 07:59 AM

Cleared the codes, drove around, they all came back. Cleared them again, swapped out my N75 valve, and drove around more. Boost is a little better, but at best feels stock (I have the GIAC chip).

After that, I'm only getting the Positive Deviation code. Tried to log boost, which I was successful in, but thoroughly screwed up trying to graph. Anyway, you'll get the idea. I switched "boost" and "time" around on accident.

**ENDEE666** · 11-14-2008 09:40 AM

Do you have a boost gauge? Even one you can hook up short term would help diagnose. And since you had a TBB issue, check connections at the diverter valves too. Can't hurt and they may have come loose in the process. Are you getting any noises or is it just not making power? And reset the codes again. See what comes back up.. Do you also have a manual boost controller you can hook up instead of the N75?

**pit viper** · 11-14-2008 10:02 AM

Originally Posted by ENDEE666

Do you have a boost gauge? Even one you can hook up short term would help diagnose. And since you had a TBB issue, check connections at the diverter valves too. Can't hurt and they may have come loose in the process. Are you getting any noises or is it just not making power? And reset the codes again. See what comes back up.. Do you also have a manual boost controller you can hook up instead of the N75?

As of this point, I don't have a boost gauge or a manual boost controller I can hook up. I don't hear any weird noises, either. just as the turbos are starting to spool I can hear them, so they're trying anyway.

**Daft** · 11-14-2008 05:40 PM

So wait.... You cleared the codes and every one that you listed above came back?

You have oxygen sensor codes, EVAP codes, Positive boost deviation, a clutch switch issue and an issue with the valve adjustment solenoid on the driver's side cylinder head.

If these are ALL coming back after clearing, you have a ton of items to fix....