I'm trying to trouble shoot this, so I'll list the engine mods.

Bottom end:

Mazworx oiling grooves to block
ACL main and rod bearings
Eagle Rods & 9:1 87mm CP pistons
Apexi 1.1mm hg

Head:

supertech +1 6mm stem exhaust valves
supertech +1 6mm stem intake valves
supertech bronze guides
supertech 106 dual valve springs with ti retainers
HKS Step 3 272 cams w/ tomei solids

Drive train:

Shaftmasters (best name ever) aluminum DS
Nismo/Exedy twin plate

Fuel/ECU

Nismo 740cc injectors
Z32 MAF
Epstein Flashed ECU
Aeromotive FPR

I've ruled out a lot of things like vac leaks (had the boost controller ports backwards) and pressure tested showed no leaks in my piping. The car will idle, and when I hit the AC button it will jump up like is is supposed to. The car only stalls if I rev it then get off the throttle completely. Coolant temp sensor has been replaced too, which solved the hunting idle issue, but not the stalling issue.

Driving, the car accelerates like it should, builds boost correctly. It just stalls when I come up to stoplights like 75% of the time. AC on or off seems to have no effect on the probability of a stall. Anything I'm overlooking or is there an obvious reason why I'm having this issue? I'm trying to get the car trouble free before I come down there to get the car tuned.

 

I had the same stalling issue before recirculating my blow off valve. Before I recirculating, raising the idle fixed the issue but it was only a temporary fix. I'm sure Epstein will help you regardless, I have an Enthalpy tune also and they helped me through any troubles I had.

 

Thats probably going to be my next step, kinda. The piping puts the bov on this kit just before the intercooler behind the bumper, and its an apexi bov so no recirc for me. However, because its a twin chamber thing, I can disconnect the top nipple and it'll never open.

 

I would get a different blow off valve that you can recirculate if I was you.

Try raising the idle on the IACV then go for a test drive. If that fixes it, the BOV is the culprit.

 

i've got a GReddy suction kit with catch can, and BOV recirc fitttings... that will solve your stalling probs due to BOV to the atmosphere..

let me know, i'm letting it go cheap, comes with inlet, outlet, and intake, hose for CC, and couplers

 

I've got a catch can installed and it is connected to the turbo inlet. My setup doesn't let me run any kind of suction kits except for a filter.

Here is an older pic of the setup.


It is all coming off in a few weeks for this.

 

yeah, recirc that BOV to your intake, after the maf, before the turbo i think... but def after maf... that should solve your problems

 

i had the same problem, and my MAF was too close to my turbo, i just put in a longer pipe and it was all good

 

Yea thats how it is suposed to be done, but this is what the bov looks like, so it won't work. I can just disconnect the vac line from the top and go without. I'm not a fan of how loud it is anyway.

 

well. if you want to maintain the BOV to reduce compressor surge, you CAN just kick up your idle like Chrome said....... i'm VTA right now, and i have mine kicked up, never stalls on me anymore... every once and a while it'll drop to like 200RPMs and the dash lights will come on, and then it goes back to normal, i have it set around 900rpm @ idle...