ENR34

After having the car for a while, I started to notice a kind of surging / hesitation when on boost. Some times the engine would feel fine, other times the performance would feel noticeably blunt. Once when I got the car back from the mechanic, it felt absolutely terrible the whole time. On that occasion it turned out to be that they had disconnected one of the knock sensors and left it unplugged. I ran a ECU diagnostic using my paper clip method - it alerted me to a knock sensor issue. The hesitation issue was nowhere near as drastic as the unugged knock sensor, so I was considering a few things that may have caused the problem : Spark - lots of RB25 and RB26 hesitation issues are caused by faulty coil packs or other ignition issues like cross firing to the head. I am running stock coils, so these could be a problem. Fuel - insufficient fuel could be a problem. However I think I have my fuel pump and return line issues resolved at the moment, running a Walbro 460lph pump, with...