Can anybody help me please I've got a 91 3000gt vr4 that I replaced the ptu and all 3 coil packs 8 months ago and I put in a chromed ecu in 3 months ago jus thee other day I was working on it putting gouges in it now the car runs really really rough when it's completely cold it runs but has a slight misfire but when it warms all the way up it runs like complete hell now when it's cold the very front coil has spark not much h but it does and when it's all the way warmed up the very front coil pack is completely dead I switched the coil packs around and the problem stayed in that area any ideas I'm new to the whole 3000gt community