Suzuki 1.6 16 valve rough idle

[Shears#22]

I’m new here. Got a samurai with a 93 sidekick 1.6 16 valve engine, ran like a sewing machine started dying at idle but over a month span it got worse started skipping and reving at idle. Long story short I have replaced every sensor on this engine including having the engine rebuilt. Have removed injectors cleaned them. All new vacuum lines, new fuel pump, fuel filter, fuel regulator, new cold idle control valve, new idle control valve, cleaned throttle body, you name it I’ve done it. After all this it still runs rough at idle and cylinder 3&4 on the header tubes get cherry red vs 1&2 do not. Any help would be great! It’s basically a bran new engine only things that haven’t been replaced is O2 sensor , injectors and ecu