97 Montero Sport LS 3.0

Hello everybody, I’ve been having this trouble code for two years already and it’s been giving me a headache. I’ve changed spark plugs, plug wires, moved the injectors around, and even the coils. It’s a brand new motor and I have taken it to two mechanics so far. I’m guessing I have a vacuum leak somewhere but I don’t know where,i do notice the LTFT go down to zero when I’m driving and the STFT also get close to zero. I changed the intake manifold gaskets upper and lower. I would appreciate the help from anybody I also took a picture of the fuel trims at idle. I have a high idle since I replaced the gaskets, maybe I didn’t line it up right?

https://imgur.com/a/UulcXG2

 

If 1,400 RPM is your idle speed, figure that one out before diving into fuel trims. Something went south there (I mean idle speed).

 

Thank you I kinda had the idea already about it lol. It used to idle at around 750 but I changed the upper and lower intake manifold gaskets Wednesday so I pretty sure I didn’t line it up correctly so will pull it off again and double check everything. Hopefully I can solve this problem