so when i'm driving i'm having a issue with partial throttle input. if i try to give it light throttle for say, leaving a light or even let completely off the gas and then lightly step back, it hesitates, well sorta. more like has no guts until i either give it more throttle or let the revs climb higher. TPS and timing are set to factory Mazda spec but that seems to be more a problem then a answer. if i set my TPS to .5V or less, the amount of throttle i have to give it to make the given needed power is greatly narrowed up. if i reset it back to 1V and go full advance on the CAS it narrows up as well. i've checked timing with a known good gun and driven with my multimeter hooked to the TPS to look for any obvious problems. nothing. i even swapped to another TPS and still got nothing. i can't leave a light without almost killing it or having to rev it to 2k and slowly letting the clutch out. what is the deal? it has no real guts until you can feel the other two butterflys open for the outer ports.

mods done to engine

86 base
S5 T2 swap, small street port
S4 NA ported TB (polished w/front butterflies removed)
88 S4.5 wiring harness (high impedience, single TPS)
N333 ecu, 318 MAF and pressure sensor (12V backfeeding wire taken care of)
corksport intercooler kit
MSD 6A
FD alt
RC 750 secondarys, stock 550 primarys
MSD plug wires, factory T2 plugs
no BAC, PS, AC

 

nobody has any advice?