s13 blacktop Boosting Problems

[Asia989]

740cc injectors
Z32 maf
Enthalpy Tune
s14 t-28

when the avc-r is off car has to break up issuse's till about 6 grand, when i turn it on i get about to 10 psi and the thing is breaking up bad. i tq'd down my intake manifold seeing it was loose, tq'd the rail down, only other thing i can think of is the line that attaches to the cold pipe. Anyone wanna shed some light on this?? lol

[evildky]

"breaking up bad"? doesn't sound like a boost leak, sputtering and backfiring under boost tends to be fuel or timing related

[vocationalzero]

Does is sputter? Backfire? What is "breaking up bad?"

[Asia989]

problem was fixed, plugs were at 35, instead of 28, my gapper lied to me ;.;