BlackZenkiS14

So I have a weird miss issue that only happens when the engine is warm. The car idles and maintains an idle at 900rpm without trouble.

When I first start the car, it will rev just fine. Like simply revving from 1.5-2k or 2.5-3k, however, once the engine is warm in operating temperature, it seems to miss or stutter when you blip the throttle. The issue gets worse as the engine gets warmer. And it is reflected in poor driveability during hard acceleration. when trying to accelerate it will just load up real heavy then finally snap up into power. Feels almost like a 2 stroke in the way the power comes on. Then when you shift into the next gear, it totally falls out of the power band and has to spool back up from nothing and is very laggy on power. (it only does this when warm, when tested with a cold engine (before reaching op temp), it snaps into power immediately upon shifting into next gear and lights up tires)

However, it rev's fine with the TPS unplugged, hot or cold. Can't find the connection to the problem.

I have rebuilt SR with 1k miles on it, JWT ECU, Splitfire ignition system, 740cc injectors, Z32 MAF, GTX2867R, S3 cams, NGK BKR7E plugs gapped to .025, and regular bolt on stuff.

*I have cleaned the MAF, cleaned the IACV, and checked for vac leaks.
*Plugs looked good, all a light brown/bronze/tan color, all equal across all 4 cylinders. (Brand new NGK BKR7EIX)
*All the gaskets are quality OEM, all on the engine are less than 1200 miles old. All were attached using brand new hardware, locking nuts with locking tabs. Intake gasket is brand new as well.
*Base timing is set to 15*
*TPS reads .5v when closed and 4.1v when WOT
*Tried a known good Z32 maf, no change.
*Swapped with a known good ignitor, same problem
*I replaced the Coolant Temp Sensor with a brand new OEM Facory Nissan part, and still the exact same thing. Revs great when cold, then begins to stutter and miss once it reaches op temp.
*I back probed the ECU at the CTS signal and confirmed that I am getting the appropriate reading there as well....1.2V.
*Checked codes, only code I get is the 55 "All Clear" Code.
*I also checked BOV, BOV is in good shape.
*The problem is the same with the O2 sensor plugged in, and unplugged.
*Replaced o2 sensor with brand new OEM unit, same problem.
*Swapped ignitors with a known good ignitor, and then tested my ignitor on another engine...same problems persist.
*Replaced TPS with brand new OEM TPS, same exact problem.
*Tried a new Enthalpy ECU tuned to the same specs, exact same problem in the same way.
*Tried unplugging knock sensor, makes no difference hot or cold.
*Tested a known good knock sensor and sub harness...problem persisted.
*Tested a known good set of OEM SR coil packs and sub harness, no change in problem.

Alright, here's a video that gives a pretty decent idea of whats going on. First 3 clips are of the engine cold, then a quick 2nd gear pull, then 3 clips of the stutter/hesitation issue after driving it for 5 min and doing a couple pulls. But if you notice, boost doesnt come on until like 4k and power doesnt come in until 4.5 or higher, which seems way laggy to me.

http://youtu.be/qDFuLn4zNbo

__________________
-Kyle