mktbully

VAG-COM Version: Release 607.3-UD

Control Module Part Number: 4B0 906 018 Q
Component and/or Version: 1.8L R4/5VT G 0006
Software Coding: 07251
Work Shop Code: WSC 06325
4 Faults Found:
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16685 - Cylinder 1: Misfire Detected
P0301 - 35-10 - - - Intermittent
16686 - Cylinder 2: Misfire Detected
P0302 - 35-10 - - - Intermittent
17536 - Fuel Trim; Bank 1 (Mult): System too Lean
P1128 - 35-00 - -

Readiness: 0010 1001

-----------------------------------------

Address 01: Engine
Part No: 4B0 906 018 Q
Component: 1.8L R4/5VT G 0006
Coding: 07251
Shop #: WSC 06325

3 Faults Found:
17536 - Fuel Trim; Bank 1 (Mult): System too Lean
P1128 - 35-10 - - - Intermittent
17521 - Oxygen (Lambda) Sensor; B1 S1: Internal Resistance too High
P1113 - 35-10 - - - Intermittent
16795 - Secondary Air Injection System: Incorrect Flow Detected
P0411 - 35-00 - -
Readiness: 0000 0000

---------------------------------------

here are the individual groups..
Group 032

At idle additive
-10% .. +10%
-0.9
-----------------
P.throttle mult.
-10% .. +10%
25
----------------------
Group 003
Idling speed
740-920 rpm
800
-----------------
Air mass drawn in
2.0-4.5 g/s
2.64 <-- this stays around the 2's at idle
-------------------------
Throttle valve angle
0.2-4.0 %
3.1 <----- 3.1 to 3.5 range at idle
--------------------------
Ignition angle
0-12° BTDC
15 <------------ ranges from 15 to around 13
----------------------
Group 115
Engine Load
12.75-175 %
17.3
--------------------
Specif. charge press.
1350 - 1750 mbar
990
--------------------
Actual charge value
Differ. max. 100 bar
1010
-------------------
Group 113
Air Pressure
500-1200 mbar
995
------------------
Group 115
Specif. charge press.
1350 - 1750 mbar
990
----------------------
Actual charge value
Differ. max. 100 bar
1010
------------------------

from reading the FAQ and doing a search i've replace the two vacume lines that are the ends of the intake manifold..one was for fuel pressure regulator.
there is another hose that goes from under the intake manifold that goes to it looks like N75 valve....i haven't changed that yet..(just found this line today)

i'm also going to change the L hose since i read that this is usually brittle...but the old doesn't appear to be leaking.

i changed the plugs and the old ones came out looking ok. slight white residue.

also changed the fuel filter since it really needed it. also did the air filter just in case.

the front O2 sensor was replaced recently also.

i read that other possible parts...
MAF
N75 valve
fuel pressure regulator

before i dump more parts into it anyone have any suggestions?

after i reset the light the next morning the car was having a very rough idle (i assume misfire) and it actually stalled.

when the car is warm it appears to run "ok" but not sure if there's a boost leak or something that i just don't know.

sorry for the long post...hopefully all this data helps.
Thanks!
Dan

Neo1130

Definatly sounds like a MAF, log your MAF block at WOT till redline and tell us what you find

mktbully

I'll give that a shot..but a bad MAF will give a lean condition i read that it's rich on bad MAF?