little knowledge needed ,, please..help

[elvis2007]

having a problem with fuel cut,,, i think,,, past 4000 rpm wot.
im running 15gs, 550 denso. walbro 255 hotwired. fpr, fmic, still running my maft. fuel pressure set at 40 lbs. no leaks i know of,, recently tested. base timing set at 3*. im trying to see if anything points towards a mechanical problem instead of and air, fuel, timing issue.
can i send a log to someone to check out for me.. im having a problem posting it on here.
my batt voltage is dropping to 13 volts about the same time it cuts,, no knock really,, maybe 1 or 2 counts at most. fuel trims running 99.8, not sure on fuel pressure, dont have an interior guage. injectors running 25.86 ms at 126%, then they drop to 0 on both counts for a second, then it picks back up again. at that point batt voltage was below 13.1 volts. this is all at tps 99.2%,, open loop.

maybe a fuel pump problem causing high idcs.??? this is where i get lost..

[Gray Haze]

your too rich @ WOT, or the boost is too high.

[elvis2007]

well,, im only running 1 bar at the moment. at idle my o2 trim gos from 38 to 120 randomly,, and not like cycling,, it sets for a few on one,, then it changes. you can tell by the motor when it happens. same while driving..
when it drops out there is no knock,, so i dont think the boost is to high..
and my wideband goes from way lean to way rich alot,, 60 mph,, even throttle, you can see it change on the logger. no matter how much i lean it or richen it up. im trying to get a log posted.

[Gray Haze]

fuel cutting @ 14.5 PSI on 550s? Your either too rich, or
u have something causing you to HAVE to run rich.

[venik]

what plugs are you running and what gap? how many miles on them? running lean for an instant or alot usually means spark blowout, cause the air isnt being burnt

[DCIV]

I had htis problem with a stock FPR and hotwired 255. Aftermarket FPR and change your fuel filter. Also seeing as your 1g, check your ecu caps while your at it.


Coop

[elvis2007]

o.k.,, i have an aftermarket fpr with the pressure set at 42lbs. and a new oem filter. i changed to an ecu i know is good, and no change..
i did notice tonight that when i hit cut,, no matter what boost or a/f im running, the batt. voltage drops from 14 or so to 13 or below..
i might change the fpr to another to make sure its not bad..
but as of this moment,, im stuck..
btw,, after changing the ecu,, with the same settings on the maft,, the car is running pig rich. low trim 89.8...high trim 96.8... 02 trims at 100-120.
im still noticing the o2 trim jumps from 120 to 32.8 alot. it will do this at idle with no pedal also..
i like my car to much to shoot it,, so shoot me instead......

[elvis2007]

o.k. new issue.. quick ride tonight to check things and i get an o2 cel,, and a #42 speed sensor cel. my o2 trims are leveling out but still rich. im gonna adjust and check again tommorow. maybe itll come to me in a dream,,,,

[DCIV]

Have you pressure tested?


Coop