HELP: CEL/TPMS/Parking Light (Searched)

[TofuShop]

Hi all,

*Before i begin, let me say that i did search and my issue is a little different from the threads i read through already.

On the way home, i was cruising at 50 mph (it's raining in NJ) in 6th gear and i'm casually changing lanes. As i'm changing lanes, i drive over a small puddle (not deep, thin layer on the ground) and the car shudders REALLY hard. I believe the car ABS'd. The all the lights immediately turn on and start flashing: CEL, TPMS, Parking brake






I'm freaking out, thinking i hit/ran over something or popped my tires. I coast to the shoulder and pull over. There is no damage anywhere. Nothing on bumpers, fenders, tires, etc; all good. I go back into the car and shut down. Wait a few minutes and turn the car back on. The above pictures is what remains.

This is where my problem is different from other people. My idle is rock solid and my car sounds normal. HOWEVER, when i rev my car, i can NOT build any boost. Right when boost should be building, i hear all the air escaping in a sharp whistling sound instead. This leads me to believe i have either:

1- boost leak (coupler on intercooler, etc)
2- diverter valve broke and is leaking air
3- wastegate broke and is leaking air

QUESTION- if our car goes into limp mode, does the ECU prevent us from going into boost? does it keep the wastegate/dv open?



i saw MYFASTA4's thread with a similar issue (limp mode), but it looks like all he had to do was get his codes cleared and then was A-OK:
http://www.audizine.com/forum/showth...er-b8-in-limbo

Also saw majateck's thread where a plastic cap on the back of his engine popped off and was causing his issues. however, he was having a rough idle and other issues i am not experiencing:
http://www.audizine.com/forum/showth...ng-2.0T-Engine

i saw the broken intake manifold thread, but i don't believe i have this issue. i don't hear a 'baseball card in the spokes of a bike' sound. can anyone tell me any of the other symptoms for this?
http://www.audizine.com/forum/showth...e-vote!)/page2


Any help or suggestions are welcome. I'm trying to narrow down my list of areas to check tomorrow morning so i can hopefully go in to the office if possible.


Thanks

[k9lovr]

Given how new your car is I would guess number 1. I am not sure about the limp mode question, but given that you just had the K04 installed, maybe a intercooler hose came loose? Have you run a scan?

[TofuShop]

That's what i was thinking also, however my idle was rock solid and from my quick check in the dark with my cell phone as a flashlight, i did not see anything loose. I will check more thoroughly tomorrow, though.

When you say scan, do you mean with an OBD2 scan tool? I don't own one unfortunately. My brother has one but he lives about 45m away. I'm going to try to get it from him to use.

[k9lovr]

That or a VAG COM cable...should be able to point you in the right direction. If not I would suggest hitting up the regional section to see if anyone near you has a VAG cable to scan the ecu for codes....

[ddun]

I'm willing to bet one of your intercooler pipes popped off.

It will idle fine even with the pipe popped off, Throttle body is closed regardless. If it was your intake manifold it will idle like shit (first hand experience).

Same thing happened to another member not sure who, I pointed out it might be that his eurocode intercooler pipe popped off. He denied it, took it to a shop they didnt know what was the cause, inspected DV it was fine. Finally he traced all the piping for the intercooler and found one end disconnected.

Had the same symptoms, limp mode, the sound of air coming out. Cruising in the same speed, i believe in rain as well

VAG scan will probably report something wrong with boost, overboost, requested boost not met, something with boost

[TofuShop]

k9- ah, didn't know vagcom cable could datalog also. thanks

ddun- i'm definitely going to trace the entire path of my fmic tomorrow. i hope it was something as simple as that

[TofuShop]

i think my intake manifold needs to be replaced. i cleared the codes with a scantool and the car idled really bad. after a few min, all the warning lights came back on and idled fine. however, there is a loud ticking sound (like a baseball card going through the spokes of a bicycle).

i have an appointment at Audi tomorrow and luckily they have a loaner for me.

Sigh, bad news. I RARELY go near redline or into full boost so this is really discouraging. I usually cruise and drive slow. I'm thinking about trading in the car now.