i just installed a walbro fuel pump that is 255L per hr and my car barely starts and when it does it blows thick black smoke and it sounds very lumpy through the exhaust. I had the flash tuner on to it and leaned out the car but still having the same problem, less smoke though but car still barely starts and wen it does is very lumpy should this be happeneing if so is it a matter of getting a new tune, due to the increased amount of fuel flowing in to the engine?

adjust the fuel pressure reg

awesome that worked, car is all good...thanks heaps