sr20de back fires at full throttle help

[pedroa06]

Red Top SR with about 80k miles or so
-ISIS V2 Tubular Turbo Manifold
-ISIS Screamer Turbo Elbow
-Blitz BOV
-ARC Side Mount Intercooler
-DIF SS Braided Turbo Coolant & Oil Lines w/AN Fittings
-3" Megan Down Pipe w/ Flex Tube
-3" Unknown Test Pipe
-3" CX Racing Exhaust with no resonator

i just recently bought it and well like title says when i run it maybe like half throttle it boosts fine no problem but when i actually go full throttle it backfires on me and it just honestly goes no where
ive clean intake filter and maf sensor
any help on what it could be or what should i check?

http://i420.photobucket.com/albums/pp283/pedroa06/2011-12-15_11-45-52_284.jpg
heres a pic of my s13 by the way i just recently got it

[redline racer510]

what do your afr's look like when this happens? Could be a fuel or spark issue

[pedroa06]

i actually dont have an afr gauge bro
i know that when i bought it new spark plugs were put on ngk iridiums
the boost is only 5 psi
what do u think should be a recomended plug gap bro?

[redline racer510]

depending on heat range.028-.035. I would keep it around .032 with your current mods and boost

[sharpe_corners]

BRO BRO BRO bro

[rickRHD]

hey pedro. this is rick. the guy you got the car from.

when i first got the car back in July, it was running fine then out of nowhere it started to randomly misfire under WOT. i changed the plugs to the NGK Iridiums (BKR7EIX) it has now & it got better, but still misfired every now and then under full throttle from a dead stop. the iridiums already come pregapped to .032 (got them from FRSport), so don't regap them. if i'm not mistaken, you're not supposed to gap iridium plugs because it'll damage the tip of the plug & they might just get trashed & not work.

in the package i sent you, i also included 3 extra coil packs. they're from a non-turbo SR, but i think they'll work. usually when a spark plug goes bad or the gap is too big, the coil pack has to work harder to provide the necessary power to ignite the plug, so when that happens, the coil just gets overworked & eventually craps out. could be something as simple as a bad coil pack.

another thing i would try is to see if you can source a similar MAF and try it on the car. sometimes the sample tube (the thing inside the MAF that meters the air) just goes bad.

[pedroa06]

wassup rick
yeah kool i been lil busy but once that box comes in ill slap on them coils and see how it does if not ill just order some oem coil packs
and yeah ima see if one of my boys will let me test out my car with there MAF once i swap them coils
thanks man

[steve shadows]

Blitz BOVs are notorious for leaking...just a thought