seriously dude change the plugs, this isn't the first time I've seen these cars start misfiring after a ECU upgrade and plugs are to blame.

 

That's what I'm going to try first. What plugs do you recommend?

 

with your new software you should be using NGK bkr7e plugs gapped to .28 also denso ik22's are another option if you cant find the NGK's... I usually have to go to 2 or 3 stores before I can find the bkr7e's

 

Alright, went to the parts store and bought the spark plugs, so I'll change them when I get a chance. I swapped out the ecu to the mtm chipped one before i went and the car seemed to run better on the way there. I VAGed it for codes and this is what came up from the mtm ecu:

VAG-COM Version: Release 311.2-N

Control Module Part Number: 8D0 907 551 A
Component and/or Version: 2.7l V6/5VT G 0003
Software Coding: 06711
Work Shop Code: WSC 20112
9 Faults Found:
16486 - Mass Air Flow Sensor (G70): Signal too Low
P0102 - 35-10 - - - Intermittent
18010 - Power Supply Terminal 30: Voltage too Low
P1602 - 35-10 - - - Intermittent
18057 - Powertrain Data Bus: Missing Message from ABS Controller
P1649 - 35-00 - -
17539 - Oxygen (Lambda) Sensor: B2 S1: Internal Resistance too High
P1131 - 35-10 - - - Intermittent
17521 - Oxygen (Lambda) Sensor: B1 S1: Internal Resistance too High
P1113 - 35-10 - - - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16685 - Cylinder 1 Misfire Detected
P0301 - 35-10 - - - Intermittent
16688 - Cylinder 4 Misfire Detected
P0304 - 35-10 - - - Intermittent
16687 - Cylinder 3 Misfire Detected
P0303 - 35-10 - - - Intermittent

I cleared the codes and I'll vag it again when I get home from work tonight to see what happens.

 

The power one has to do with swapping out the ECU, don't worry about it.

You have a BOOST LEAK! It's telling you that.
Your O2's are bad

Start there, since it's on most cylinders, once you change the O2' & fix the boost leak, if it still does it, the MAF & CTS need to be checked

 

Chip installation

Check the above link At the end of the *.pdf file, It alks about throttle adaptation.. read it. It might help.. good luck

 

Just got back from work and the car was missing on the way back. VAGed it and only got o2 sensor readings, so hopefully that will be all that's wrong. I'll change them as soon as I get them and the spark plugs and give an update. Meanwhile, any other opinions are appreciated. Also, anybody done a DIY writeup on changing the o2 sensors? and has anyone done it that might want to give me a rundown? Thanks

 

no but they look like a PITA to do

 

I thought they were easy to get to when I disconnected/removed them...

 

This weekend I changed the spark plugs and the abs pump/module. Took the car out for a spin and it had a dead spot around between 2500-3000 rpm, but when it got above that, the power came back. This morning i shifted to second gear and lost all power. It wouldn't let me go above 1200rpm and it idles really rough. Here are the codes I got from it:

Monday, 07 April 2008, 13:38:43
VAG-COM Version: Release 409.1-S

Control Module Part Number: 8D0 907 551 A
Component and/or Version: 2.7l V6/5VT G 0003
Software Coding: 06711
Work Shop Code: WSC 20112
3 Faults Found:
18057 - Powertrain Data Bus: Missing Message from ABS Controller
P1649 - 35-00 - -
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-00 - -
17743 - Engine Torque Monitor 2: Control Limit Exceeded
P1335 - 35-10 - - - Intermittent