hi guys ive done a 1.8t conversion on a polo for a friend ..... with some help from you guys ive de immo it so car starts and kinda runs.

youtube videos:
https://www.youtube.com/watch?v=1xDsrP5gixY
https://www.youtube.com/watch?v=5RQCoT9Sn4I
https://www.youtube.com/watch?v=NLqwgJA-U6E

Im getting few dtc i dont car here now but will post later but  my main concern is that even with vehicle speed sensor connected im still getting a dtc.

my questions are:

will no speed signal affect the running of this engine? (seeing 0 as selcted gear in vcds) seems to bog and pop like crazy on gear shifts as you can hear in youtube video... ive heard me7.5 wideband has correction maps etc for selected gears

Secondly will the brake pedal dtc cause a running issue??

Ive tried like 5 different ecus and so far only the ones with narrow band lambda seem to run ok but obviously id rather use a wideband ecu if possible also noticed that it doesnt have selected gear measuring block in vcds.

Many thanks in advance!

What ECU are you using?  If you're using a wideband loom, which you should be, unless you constructed a throttle cable for the 6n2 pedal box, you should be using a wideband ECU.

Then, what file are you using on the ECU - is it a file for a K04?