Hi, if you want to share your advice you can do it
please feel free to share it.
i will share my little experience here:
1. before you tune a car do a good research in google.
2. before doing a tune check the car, is it in good condition, the oil level,
how the owner takes care of it, before you tune do some logs look is the car having an error
3. look under the seat maybe there is a phone and when you pull the seat you will broke it
its good to check it before reaching the obd port.
4. start with kess v2 and ecm titanium and try to do something on your car. after some learning try to learn winols
5. START WITH DIESEL CAR
6. dont focus just in electronics try to understand how the engine works.
7. first try to learn how to do an egr, dpf off, hardcut...
8. first try to learn and understand in edc15 (1.9tdi is good choice)
9. before you write the car do a checksum correction on winols
10. if you want to do this work after the kess v2 atleast buy a ktag too
11. never use file from databese in clients car
12. if you cant tune the car just say something that you cant do it (dont take big risks)
13. never do a bad tuning on clients car!!! if you cant do it buy file from internet.
14. check what you done after tuning
IF YOU HAVE SOME ADVICES YOU CAN SHARE IT
HAVE GOOD DAY!!!