hey guys, my R32 misfires (I think thats what it is?). When the engines cold and I'm slowly accelerating it sometimes has shit all power then suddenly it gets full power and takes off like its hitting boost or something (its not though). This is under 3k revs. Seems to be kinda random, but is around 2000-2500 revs that it happens i think. You can be driving along too (when its cold), holding throttle steady and drone suddenly increases and it loses power.
I have no idea where to start looking?
It's an Rb20DET, FMIC, 16psi. The ignition amplifier (I think its called, the thing that usually sits on top of engine near the firewall, little black box thing) is just hangind loosely (not bolted to anything) as coil-pack cover has been removed. There looked to be a bit of moisture around coil-packs so I sprayed WD40 and cleaned up a bit around them but it hasn't made any difference. I havent tested the coil-packs or taken them out to have a look at them or anything. Haven't checked plugs or anything yet either. Car is currently running very rich due to the way its tuned (Adj. fuel pressure regulator) runs about 50-60psi fuel pressure on idle and possibly has bigger injectors. Has standard computer. Atmospheric BOV. Bigger fuel pump (Walbro 500hp i think). Bigger turbo (custom Vg30). Pod filter. That's all I can think of.
Not sure what other info is needed to diagnose but I just think it's odd as I searched and most misfire probs were at higher revs?? This only happens when car is cold and at low revs.
Any help would be greatly appreciated! Thanks.