I've search but haven't find an answer to my problem yet. I will check on crankshaft bolt this weekend as mentioned in other thread. In the vid u can see that at bout 0:16 mark, car went full lean and if I let off it'll go back to normal.

 

Speed density or MAF? I can't view the vid at work, but possibly a huge boost leak that opens up at 3k when you start seeing boost..

 

Its on MAF. It only does it when it hits 3K and no load.

 

what does it do at WOT?

 

If I put a load on it, I can go through all the gear no problem. AFR is normal at crusing between 14.8-15.2.

 

So, you're cruising at 3k, it goes lean, you let off, and it goes back to normal?

 

Yes, basically. there were 3 codes, P0300 and the other 2 were P0443 and P0403 which are evap code. P0300 i think is common cuz i have cams. Also swung by my buddy's earlier and he did disable those evap codes for me.

I might unhook the battery for a bit and see if problem still persist.

Could it be that this issue come from phantom knock? The reason Im saying this is because, first my map o2 dump is literately touch the oil pan, second i have Boomba motor mounts (front & rear) and deleted balance shaft.

 

You need to bend the dump tube off the oil pan.

What ROM are you running? You should have the P0300 disabled. What does it feel like when it goes full lean? does the car seem like it falls on its face?

 

ROM 88590015. When it goes full lean it feels like floating, flat.

 

Gonna disable code P0300 and see if my problem come from drivetrain harmonic.