need help

[2thedarkside]

My buddy has a 03 L, well here is what it is doin it at the low end no power is sputtering at wot around 4.5k all the way through 6k. It is boosting right around 15 psi , but is not pulling like it got any balls. My stock 02 pull away.
The mods are, 4lb lower, air raid air intake, accufab sbtb and a C&L upper pleum high flo mid pipe, cat-back, and the superchager is portered mail order tune from lfp

 

[CHUXSVT]

start of with the simple stuff. time for a spark plug check. @ one point i went trough 3 sets of plugs in a week. the high low relay for the fuel pumps whent out.

 

[Dbl G]

Back out the tune and reinstall it, fuel filter, plugs, I/C temps.....

 

[2thedarkside]

I just got told he put a new set of tr6 with out of the box gap which is like 036 so now we are putting a new set of tr6 gap to stock I hope this fixes it

 

[Fade 2 Black]

Stock gap will worsen your problem. .036" gap is where they should be.