hi guys

im nick ive had an interested in car electronics for a while now i also buy maps and load them to cutomers machines but i want to learn how to modify them myself.

i have kessv2, ktag, bdm100, mpps, upa usb.

software i have ecm titanium which i am trying to vigure out how to use properly as the only guidance i have had is youtube videos which all of them seem to be loaded by people that have lost there voices and dont explain a thing they are doing.

so im looking for a little guidance on the limitations of each map
how to remove dpf and egr
how to find the immobiliser code from an ecu as i also do key programming but i am relying on external sources for the immo codes to program new keys

can anyone help educate me a little bit