Rb25 Neo Fuel/spark And Turbo Problems (Hesitation/splutter)

[Brocklein]

Recently I've just got my car back on the road after blowing the clutch, before all of this when driving it would come on boost hard and hold through the gears smoothly. The car sat still for a number of months and then the clutch was replaced, after doing this and replacing my coilpacks with new splitfires the car didnt feel as powerful or smooth when it should have felt better with a new clutch and coils, it would hesitate at full boost sometimes and every now and then it will feel like its losing fuel up top like splutters and such (could be spark also im not sure). I took it into get tuned and looked at to see if i could eliminate at least one probelm, we sat there for a few hours running it and it was fine, the tune didnt need much tweaking just pulled some timing out up top, after the tune it still felt no better and has gradually gotten worse. Sometimes it runs okay still hesitant at full boost though its like you feel it coming on hard but once its almost to full boost it flat lines. Does anyone know where i could start, Im trying to sell the car soon so id like it running to full potential with no problems for the next person, any help is appreciated, Cheers!

[Brocklein]

Also Id like to add that my AVCR was spiking really badly as well when it was being tuned so we put a boost T on instead and that seemed to fix the problem

[Badgaz]

do you have an aftermarket ecu? probably maxing out your afm.

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[Brocklein]

Yeah power fc, I have a feeling after reading a few things my car may have power fc disease by the looks of some symptoms like the car nearly dying when i come off load etc. Any suggestions?

[Badgaz]

aac valve... clean that.... for the stalling are you running a z32 maf? check your afm voltage on your commander... maximum voltage out put is 5v.... if you hit that before full power then that could be your problem.... it was on mine when running higher boost.

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[Badgaz]

also try dropping your spark plug gap to 0.85 mm could be blowing spark out.

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[Jayden.K]

Change the duty cycle lower on the avcr to contol the boost early. I just put a IW gt3076 with a tiny .63 housing and I have really bad spikes. I run very low duty cycle to stop it. Good contoller. Gapping your plugs to .80 and checking your new coil packs haven't split/crack.