removing emissions hardware

this topic id like to discuss removing emissions related hardware. so now that you removed diagnostic testing for your emissions related hardware you have a whole bunch of solenoids, check valves and sensors that no longer do anything and if you try to remove them youll loose long term fuel trims and gain a check engine light from open circuit codes or signal too high codes. the fix for this is proper configuration to tell the ecu that the car is no longer equipped with the emissions hardware so it can be removed

If you are not familiar with emissions systems on your 1.8t id recommend reading this thread on vortex :  http://forums.vwvortex.com/showthread.php?4893472-DIY-Ultimate-SAI-N249-PCV-EVAP-Delete
that thread covers all the hardware removal of the components that will be coded out. the only one that is not covered is the downstream o2 sensor but thats easy

First up to get yanked and toss in the trash can will be the downstream o2 sensor. the primary function of this sensor is to monitor catalyst efficiency. well sense we coded out catalyst diagnostics this sensor no longer has any use
"CODEWORDS"
CDHSH - Sensor 2 O2 heater diagnosis set to 0
CDHSHE - Sensor 2 O2 heater amplifier diagnosis set to 0
CDLASH - Lambda sensor aging diagnosis set to 0
CDLSH - sensor 2 O2 sensor diagnosis set to 0
CDLSHV - Lambda sensor sensor interchange recognition set this to 1
CWKONLS -  sensor configuration default is 3 set to 1

Now youll need to configure ESKONF bytes to keep ope circuit codes from showing. Esknof is a group of 7 bytes in the 1.8t, these bytes tell the ecu which options are configured in that particular file and is normally  located right above KFKHFM. ESKONF can also be found by searching AA FF 00 30... Once you find eskonf youll need to edit the bytes  in 8 bit binary.
Byte 0 AA= 10 10 10 10
Byte 1 FF= 11 11 11 11
Byte 2 00= 00 00 00 00
Byte 3 30= 00 11 00 00
Byte 4 FF= 11 11 11 11
Byte 5 F8= 11 11 10 00
Byte 6 30= 00 11 00 00

Scondary air:  It's 5lbs of utter crap. It puts fresh air into the exhaut to help with emissions on cold starts.


with MSLUB all set to zero youll need to set SLV (N112) and SLP (J299) to 11 in ESKONF to delete the open circuit codes look at the tables above ^

Evap: system that pulls a vacuum on the gas tank ensuring the fuel vessel has no leaks
you can use the "error class" trick to hide the p codes CLATEVE - EVAP plug =00, or you can use eskonf and remove the evap n80 the right way by setting to 11. eskonf configuration is ^^