Help, my engine keeps dying
 

Hi, I have a stock D14 with original ECU, big induction kit and larger throttle body.

When I am driving around normall, between 2k and 3k revs, I can see the revs just drop even though I have the gas on, then all of a sudden it will cut back in. I have looked for any vaccuum leaks but can't find anything.

Anyone have any idea?

Also when cold my idle is appauling but by changing the idle on the throttle body means it idles high when the engine is hot.