AOA everything,
Thank you so much for your responses and I am sorry I couldn't write back due to some health concerns and way too much work. Its an update that my tries to save the engine didn't work So I got an engine swap from b15d3 to d17a VTEC. So far its been a week since the swap and car are running great, amazing mileage and acceleration. I do miss my older engine, but I think this one will work great. it was a total engine, with compressor, wiring, ECU, power steer pump, fuel pump and everything included. Cost me around 65000 including labor and wiring (additional cost of 10000 extra on engine oil, power steering oil, AC gas refilling, and some little stuff here and there) and the best thing is that the engine is in mint condition.
For an update on my d15b3
I tried everything. From replacing PCV value, cleaning that black box at the back of the engine below the intake, but my cylinder 1 had low compression, plus it was vibrating. so it needed overhauling. unfortunately, I had to go with an engine swap, and D17A was the most feasible I found after surveying the market for 2 weeks.