hi this is my first post so i'll introduce myself
My names Stu, i live in newcastle and i have a 51 plate bugeye 2.0 GX
only got a few mods like:
straight through exhaust with borla headers
lightened and balanced flywheel
kn panel filter

I'v been having issues for about a week and a half now
its getting worse by the day, i'll start the car (whether its warm or cold) and it'l idle good for about 10 seconds then it starts hunting between 500 - 1000 rpm it sounds like its about to stall. Seems like its only running on 3 cylinders but no misfire fault code during idle?
when i drive the car with about 10% throttle its fine but anymore than that it starts jerking and hesitating really bad untill i hit about 3k to 3.5k rpm
if i accelerate with full throttle non of the hesitation is there
heres the list of things i'v changed so far:
fuel filter
coil pack
ht leads
spark plugs
fuel pump
fuel pressure regulator
map sensor
full trottle body (inc icv and throttle position sensors)
front o2 sensor
knock sensor

i have checked all voltage going to the fuel pump and charging volts to the battery, all is showing good

now i'm stuck for ideas, i had it on the rolling road and he suggested the car is running very lean

last thing i can think of is camshaft sensor??

 

Have you checked you inlet /vacuum pipes for cracks or leaks

 

yeah, also sprayed some carb cleaner round the areas

 

little update
took the car for a drive today and it started spluttering and hesitating like usual
got 3 pending fault codes misfire on cyl 1, 2 & 3????