Fuel cut on stock settings?

[sytrus]

I read this post earlier http://www.dsmtuners.com/forums/problem-diagnosis/283029-fuel-cut-stock-boost.html And also read: http://www.dsmtuners.com/forums/frequently-answered-dsm-questions/186971-what-fuel-cut.html
Both educated me very much, however, I am curious about the fact that in my situation it occurs randomly... not consistently.

It is almost the same exact problem that I have had since day one of the car. SOMETIMES (not all the time) when I hit WOT I hit what feels like fuel cut. I currently have a 255lph fuel pump that I have not hooked up. And I am wondering if I need to do that in combination with a new fuel rail or bigger injectors. I'm trying to keep my gas mileage at the same that it already is ( crappy ) so I didn't really want to go with bigger injectors and I really don't think they're necessary, but if it fixes the problem I'm all for it. Here is my list of current modifications to give you a general idea of what I'm working with and if anything may be the cause.

P.S. I have 0 boost leaks as of yesterday.

Mods:

SBR Stage I long-block containing the following:
4G63 6 Bolt Block
2.0L Crankshaft
85.5mm Bore ( .020 over )
Stock 1G Big Rods, shot-peened and magnafluxed
Ross Racing 8.5:1 Pistons
Topline Front Cover w/ Oil Pump Gears
Balance Shaft Eliminator Kit
TRW Water Pump
Cometic Head Gasket
ARP Head Studs
Mitsubishi 4G63 Cam Gears
Mitsubishi 1G Turbo Cams
4G63 Oil Pan
Oil Pickup Tube
EVO III Exhaust Manifold
SBR Stage I Head 100% Hot Tanked
SBR Competition 5 Angle Valve Job
New Valve Stem Seals
Stainless Steel Swirl Polished, and Undercut Valves
New Valve Guides
Stock Springs and Retainers
Fully Decked Head Surface
OEM Exhaust Manifold Studs
Dejon Tool UICP
Dejon Tool 2.5" Short ram Intake
K&N Filter
1g Stock MAS
1g Stock SMIC
Autometer boost and A/F ratio gauges
ATR 3" Cat-back exhaust
Mach-V Test pipe (cat eliminator)
Dejon tool 3" downpipe
Mach-V o2 Dump
STOCK 14B Turbo
--
I do NOT have a boost controller, and my boost remains steady around 13-15 psi. The A/F gauge stays dead center at stoich as it's run hard which is why I'm confused about it's accuracy if I am hitting fuel cut.
--
Now what is surprising to me is that I went from a fully stock motor that was dying on me and upgraded to this motor. Now with everything installed the car feels a bit slower than the old motor, and the fuel cut issue I feel is to blame. Do you think with the new modifications I could have something that is maybe conflicting with each other? Is there anything I can do without DSM-link or an AFR to correct this problem (i.e. dyno tuning of any kind, etc...)? I do not have a logger of any kind, and I'm not really familiar with any tuning software.

Do you feel it's worth it for me to install the Fuel pump if this problem is going on? If so do you think it may be enough or will a fuel rail and/or injectors be needed as well (or both)?

 

[bastarddsm]

no. there is a major problem else where.

 

[sytrus]

This motor has less than 3k miles on it. I highly doubt it is something major mainly because this problem transferred over from using my old motor, to my new one. Therefore it would involve the supporting parts of the car. What "major" problem could I have besides me hitting fuel cut?

 

[spyderturbo007]

Stock boost on the stock 14b isn't going to hit fuel cut unless you have a boost leak somwhere. What did you pressurize the system to and how long did it hold that pressure? Also, dropping in the larger injectors, fuel rail and pump aren't going to change a thing.