whats up guys well recently ive had the vehicle cut out on me when im on 5th gear at WOT. I also get a p0113 every once in a while i dont know if its part of that. When im driving WOT thru all the gears it is fine except in 5th, I also noticed at a stop when i accelerate i see my AFR's go up to 18-19 then back to normal. Would it be because of the tune or something else? Im running speed density and the plugs are fairly new gapped to 0.25. my mods are below on my sig.

 

I have the exact same problem in 5th gear as well. I have basically the same set up as you do except with a tune by AMS. Anyone else got any advice?

 

I had what could be a similar problem but i think its compressor surge

 

It's probably just the tune cutting fuel, it's meant to save your motor when it's under high load such as a 5th gear pull. It's normal.