RM879

Hey everyone I am pretty new to the forum and I am experiencing a turbo issue. I have search around the forum and cannot come up with a solid answer of what this might be. I have an '01 TT Quattro, everything is stock except for the Forge DV that I know of (purchased the car used last year). This problem occurs in 3rd gear and above, when I am accelerating from low RPM's to around 3000rpm The car makes a noticeable whirring noise that sounds like pressure is releasing and then the car bucks once. After the buck it seems to recover and then precede on its way. Also, when I have the turbo engaged from 1st gear I do not notice the problem at all. I ran the VAG-COM yesterday and the only fault was:

Control Module Part Number: 8N0 906 018 T
Component and/or Version: 1.8L R4/5VT G 0003
Software Coding: 06610
Work Shop Code: WSC 01236
1 Fault Found:
17963 - Charge Pressure: Maximum Limit Exceeded
P1555 - 35-10 - - - Intermittent


From what I can find in the forum I need to replace the N75 or I have a leak in the turbo piping. Any suggestions?

HaTTfield

Has the Forge DV ever been serviced? I believe they need to be lubed periodically. Hopefully someone who owns one will chime in...

RM879

Yeah, I serviced it last week...still the same problem.

RM879

Someone suggested to me to spray the pipes with water to see if there is any bubbling, should I use Distilled or Tap water?

bobkay

Tap water, maybe add a little dish soap.
Watch for leaks.
;o)
Bob K

RM879

It ended up being the braided hose that is running off the the silver valve (Part number 06a131102A). I replaced it with a temporary rubber hose that I had laying around, but I ordered a 3.5mm Silicone vacuum hose as the permanent solution. I am wondering if I should replace the FPR braided hose also.

Any thoughts/how difficult is it?

RM879

I still am having the same issues and I haven't sprayed the hoses yet, everything that I am reading online points me to the wastegate and the N75 valve. I was wondering if anyone knew of a semi-easy way to access the turbo....I had the car up today because I was replacing the transmission fluid due to rough shift. The drain plug was really loose and leaking oil, go figure. But I couldn't figure out an easy way to see the wastegate. I will spray the air vac lines tomorrow and post the results but for some reason I think the wastegate is sticking, any help would be appreciated.