2000 BMW 316

Engine Mechanical problem
2000 BMW 316 Two Wheel Drive Manual 101500 miles

i have a bmw 316i, its just passed its mot and just been serviced. But I still have a problem, when am driving the car it jirks, this happens especialy when I put my foot down on the gas. I think it might be the feul pump, I hope not as I guess this would cost a lot lf money to get fixed! But what else could it be? Please help. Thanks, paul.
September 2, 2009.

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