Someone please tell me wtf is wrong with my ka-t!

[Addicted2Kouki]

I have been running this KA-T for over 2 years.
Lil hiccups here and there over the years,
like vac leaks or the distributor going out.
Other than that, it ran perfect.

My setup is pretty basic:
KA24DE
GT28R
370cc injectors
N60maf
chipped ecu
HKS BOV

Recently, I came over this problem.
It was running perfectly fine before this for atleast a year.


A couple days ago, I was driving on the freeway and all of a sudden..
It bogged real quick and went back to normal.
It was similar to hitting the fuel cut on a stock 240sx,
but only for a split second.

Then after a couple minutes.
It happened again, but this time it didnt stop.
So I pushed down the gas pedal slowly to speed up.
It just sounded like it was misfiring
and all I could smell was unburnt fuel.
I kept pushing down more, slowing increasing throttle.
Then when it hit a certain point,
it had no problem accelerating or going into boost.
Its like I cant cruise, I can only idle or accelerate.

I figured this could be a problem so I exited.
As soon as I hit the first traffic light, the car stalled.

I popped the hood to check everything and it all looked fine.
Started the car with no problems
but I did hear a slight misfire at idle in the exhaust.

I drove back home and the problem was gone
until I was right around the block from my house.
(10min away from where the car died.)
Then the same bog I had on the freeway returned.

Thought it was the spark plugs,
So I changed the spark plugs with BKR7Es gapped to .35

Drove around to test it and it felt nice.
Then the problem came back.

Today I tried to diagnose.
Couldnt find the problem but I knew it was still there
because I heard the misfire in the exhaust
and it smelt like it was running richer than normal.

Does anyone know what the hell is going on with my car?