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

Brocklein

By Brocklein,
in Engines & Forced Induction

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Brocklein Rookie

Brocklein

Posted
Posted

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!

Badgaz Experienced

Badgaz

Posted
Posted

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.

Sent from my GT-I9300T using Tapatalk 2

Jayden.K Collaborator

Jayden.K

Posted
Posted

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.

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