Hi guys, I have just recently had a power fc and tune done on my r34 gtt the following mods are:
-FMIC
-FULL EXHAUST
-POWER FC
-BOV -PLUMBBACK
-Walbro Fuel Pump
So whilst driving and boosting all is ok, whilst coming to a stop and putting into reverse or just idling the revs of the car go from 900-1200 than back down than back up again, it has only happened since the tune has been done so obviously something to do that. The fuel pump and fuel filter was replaced, new penrite fully synthetic oil + filter , major service has been completed, aluminium radiator, water pump. So if anyone can tell me their suggestions that would be great thanks.