Hey fellas well the topic title pretty much sums it up.. I fitted a surge tanks to my car almost 2 weeks ago now and the car has been running fine...if anything betta! Under WOT the car has been gr8 only I was told last night by my misses that it blows black smoke..mind you I was pulling 3rds at the time. The car is a BF MK1 with all the bolt on goodies inc. valve springs + port and actuator has been done, it s a manual. Now it just started tonight I noticed under decel the car popping loudly in roughly 0.5-1sec intervals. Probably not the smartest thing to do but I ramped up on the power once at roughly 3/4 throttle, it just started to make boost and started pulling then all of a sudden it felt like traction control was kicking in and almost made me head butt the steering wheel, I jumped off the throttle straight away and limped to work.. I am going in next wednesday to get the car checked and tuned for the surge tank install after tonights events. I had been putting off getting it tuned after the surge tank coz im a lazy turd and havent had the time at the moment. Does anyone have any ideas what it could be off the bat..? I realise fingers will point straight at the surge tank install but as I said it has been running beautiful for the last 2 weeks.. Thanks guys