Hi Phil, I'm sorry for not being clear, (my language is spanish) <img src="/forums/images/graemlins/smile.gif" alt="" />, I guess A/T is the type, and no, I did not change nothing about my driving habits. The fuel system was checked, flushed and cleaned at the same time as the OS(oxigen sensor) was changed, the guy told me he changed the "o" rings of the injectors.

Byron