Hi if i have put this in the wrong section pls move it.
Here goes i have a problem with my r32 gtst on a cold morning the car has no power it will boost fine but the revs are very slow to pick up and it kinda has a knock when i change out of first gear (gearbox is fine). at the same distance and when the car is warm it drives perfect. only happens when car is cold?
maybe o2 sensor, fuel pump?
only engine mods are: full hks exhaust
de cat pipe
pod filter
split fire coil packs
front mount intercooler
any suggestions would be great thanks?