Hi Hash,
Hmm AC is working fine, but when AC On, pressure on Engine increase. before i was not facing that issue, it startd around 1 or 1 n a half month ago.
1st i will try to clean its CAT Convrtr, after that if the issue was still there then wl chq its compressor as well.
Additionally,is there any special technique or oil or something available for Cat convrtr service? Because one of the mechanic told me that remove it, but i told him that no, do the service, he told me he will do the service by using some oil, taizab etc. well i dnt know, whethr he will do it correctly or jst so so...?