ok guys this prob is pissing me off. in 3rd, 4th, 5th gears above 4000 rpms my car hesitates pretty bad. and it does do it all the time but when it is hot outside it does it all the time. ok this is how bad it is, last night was about 50 degrees out and my buddy was out in his 1 gen rx7 and we got up on the high way and he started to pull on me???? nothing really done to the seven. you can read my mods below. doesn't make sense.
98 svt t-red
kkm,bassani cat-back, superchip,pulley,B&M,18" konig toxxins w/ 215/35zr18 falkens, stock rims with 215/45 falken azenis for auto-x,limo tint, 3-12" alpine type S's and a A6001 xtant amp,XM radio,alpine cd,xtant a4004,alpine type R 5 1/4 components up front,boston acoustics highs out back, eibachs, kyb gr2's,sub frames,bat high flow y-pipe, street glow underbody (red)
new-quaife,grizzley clutch and fidanza flywheel-plans to come nitrous,stut bar
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I'm no expert, but above 4k rpm's your secondaries are open... too rich/lean? I dunno--I'll shaddup and let the experts talk. Good luck with it.