Sputtering At high boost

[drewgo]

When ever I am on high boost the car spudders really bad and falls on it's face. Lower the boost to 15psi and it pulls just fine and smooth.
Now I know I'll need to change and regap my plugs, but can anyone think of anything else that I should pay attention to? And what Gap should I run?

 

[suprahero]

My plugs are gapped to .029.
Has your car been tuned for high boost? What turbo are you running? Are you still on twins?

 

[garagefujimoto]

Try 32 gap on NGK 6097
You shouldn't need a HKS Twin Power Quite yet..

 

[drewgo]

I have a gt4082, 550 inj, did 468 @ 20psi.

 

[Ric]

6097's @ .028.

 

[kysupra]

how about your fuel system? is your pump keeping up with your demand at high boost? do you have a Wideband? if so what are you AFRs?


Mine did the same thing, when it fell on its face the AFRs shot up, think my pump was lacking and now i need new pistons