93 FD
Pettit Racing Mild Street Port 13B
Stage 3 BNRs
Apexi Power FC
full 3" exhaust
Stock 550/850 Injectors
Stock Fuel Pump/Rewired For Proper Voltage

I Have Been Having a huge lean spot on slight throttle movement, say im idling @900-950 RPM Range @ 12.5 AFRs if i slowly touch the throttle it cuts fuel and goes to 15-16 AFRs, the idle is perfect no rolling or idle hunting on decel. its just that initial throttle movement where it hits a lean spot when i slowly open the throttle. BUT when i stab the throttle, it doesnt hesitate its acts perfectly normal under fast throttle movement. ive checked the cable to see if maybe it needed to be adjusted but it still stumbles if i pulled the cable slowly the same way as if i was pushing the pedal slowly. i just dont get whats going on ive tried adjusting some cells in the PFC by adding fuel, still nothing. tried adding fuel in the accel enrichment table in the settings and still no help.. someone please assist me in solving this annoying issue

 

What are your TPS voltages with the throttle closed?

 

I am going to my garage now i will reply shortly with the TPS Volts

 

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vta1 : 0.56
vta2 : 1.22
fully closed

 

They are within the correct range, VTA1 seems a little low for having the VTA2 at 1.22.

do the voltages increase without any issues when you slowly depress the throttle? Look for a dead spot.

 

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No sudden drops it gradually increases with no sudden drops. I did however plug the power fc into my computer an pulled up the dataloggit software, i went to the INJ vs Accel TPS1 and increased the settings from in the right column. I increased each column on the right by a few increments and that seemed to of helped

 

Settings 2 - Accelerate Injector (mS) is where you add acceleration extra fuel. This table is the gross or total amounts.
Settings 2 - Inj vs TPS TPS1 is the fine tune or final adjustment to how much of the first table is actually applied.

Experiment with them.