Hello,
Have you ever check your GTA Samp folder what exist in it,
Your ban and mine are have same reason Health hack vehicles,
May when you enter in any place in game while your vehicle is damaged
Then get out you see it new and you think thats happen in the luck,
If you think that's happening lucky you are wrong so you can find file called main.scm in your GTA samp folder
It's hacck folder for health of vehicle and as MD045 told me it give you max health of vehicles even tho sometimes your vehicles take damage,
May you are not using a hack and installed the game normally but maybe from this file the hack.
Note: i said all that because i'm banned from the server for the same reason.
Thanks.