4jg2 engine concerns

[louiesoy]

good day!
newbie ako dito sa tsikot and I'm from Davao city, i owned an isuzu bighorn xs manual (japan) with 4jg2 engine. i have some queries sana masagot:
1. What might be the problem na when mag trip off ang A/C or off mo na A/C instead na magtaas ang idle ng makina parang na cho-choke ang engine and may sudden vibration; and
2. What is the effect if the timing belt snaps or breaks? Mag-aabot ba pistons and valves as what will happen to other belt-drive engines like 4d56 of mitsubishi?

Hoping for a informative reply from other members.

thank you in advance.

[batosai]

sir pa check nyo po iddle up valve if working properly.

If si timming belt naman, alam ko if ever maputulan ka nito masakit sa bulsa ito