Hello all, it's been awhile since I posted so bare with me. I've got a '00 SE auto with Volant CAI, Focus Central 4-2-1(with O2 cheater), and MBRP Exhaust. From a dead stop hitting wide open throttle the car bogs and stumbles, almost lunging. I can see the tach jumping from idle to about 1500-2000, it'll do this about 2 or 3 times and finally take off. This also happens sometimes if I'm riding slowly (under 30) and punch it. I'm taken the car to countless shops and even a dealer and no one can seem to figure out what the problem is. I don't think it's the fuel pump b/c it's been replaced twice already, the last time with the new version. I've tried cleaning the MAFS and replacing the TPS. I'm about to get fed up and get rid of it, but it's the first car I ever bought and paid for myself so there is quite a bit of sentimental value in it. Any help would be greatly appreciated.
