Alright folks here's the deal. Just recently bought a 2001 2.7TQ and the CEL came on the other day. It still seems to be running fine although i can smell fuel when the windows are open. I was able to acquire a VAG-COM cable for pretty cheap so I scanned it and here's what i got.

3 Faults Found:
16825 - EVAP Emission Control Sys: Incorrect Flow
P0441 - 35-00 - -
17963 - Charge Pressure: Maximum Limit Exceeded
P1555 - 35-10 - - - Intermittent
17539 - Oxygen (Lambda) Sensor; B2 S1: Internal Resistance too High
P1131 - 35-10 - - - Intermittent
Readiness: 0000 0001

On top of that, after the engine warms up, the EVAP purge valve starts going nuts, just clicking away like a machine gun. Does anyone have any suggestions? Thanks in advance for your help!!


Edit: also there's some light smoke coming from the left side of the engine, between the valve cover and the airbox. I believe i've narrowed it down to a seeping valve cover gasket but are there any other causes? Thanks.

 

For the fuel smell, I would start with the crazy, clicking purge valve, just replace it

Looks like you over boosted at some point, do a pressure test to look for boost leaks, clear code and hope you have the poblem solved

Driver side O2 is on it's way out, clear code and wait for it to come back, before clearing the code, check measuring block 032 in the engine module of VAG COM, it will give you your long term fuel trim, which is directly affected by O2 sensors, if it looks like one bank is running richer than the other, you may have to go straight to replacing the sensor. Driver side front O2 is a PITA

 

when measuring block 032 should i measure it like the other things that have to be measured with the engine running? meaning between 1880 and 2280 RPM?

 

So here are the results of the scan.

13:10:51 Group 032
-0.9 % Lambda
-8.6 % Lambda
-1.7 % Lambda
-8.6 % Lambda



I dont know if that difference in values is within acceptable tolerances or if they should be identical.

 

These look like good values, I would just look at getting the purge valve replaced, the rest should take care of itself

 

well from the looks of it, the purge valve is pretty easily accessible. Looks like it would only take about 5 minutes to swap out. Is there more to it that i'm not seeing or should i be able to do it myself.

 

Easy fix, what you see is what you get. Block 032 are LTFT, essentially how much fuel your ECU is cutting or adding to achieve a perfect balance. These values are based on your ECU maps as well as input from O2 sensors, one of the first things to get way out of whack are LTFT if an O2 goes south

 

I've replaced the purge valve...still getting the fuel smell and all 3 codes. What should I look at next?

 

So I took the car down to the good folks at SCR Performance in Loveland, CO...here's a list of what's wrong with the car.

Leaking cam seals and cam tensioner seals
Leaking injector O-rings
Blown diverter valves
Torn throttle body boot
Bad control arm

All told it'll cost me $2000ish in repairs. Not at all how I was expecting this to go.

 

Can you do it yourself,

034 TBB $40
DV's under $100 for the pair
Control arm- cheap look around check FCP groton
injector O-rings- super cheap
cam seals are als cheap, kinda a PITA but very do-able

If I were to guess, I would say I could do all this in my driveway for under $400