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Car "bucking" when accelerating

If that is the SVT Focus pump (a modification), please search CEG. If not, as far as I know the right pump goes in as the old came out. 9I'd start a new post topic to get better help.)
 
If that is the SVT Focus pump (a modification), please search CEG. If not, as far as I know the right pump goes in as the old came out. 9I'd start a new post topic to get better help.)
It's a redesigned pump for the Contour, as it sits vertically and not horizontally. I got it off of teamfordparts.com. I actually got my answer by searching on google. There are four black tabs at the bottom of the tank that hold the horizontal version of the fuel pump in place. Those tabs need to be cut off, but you can use a regular straight cutter for it. They need to be cut so the vertical fuel pump can sit at the very bottom of the tank.
 
I have the issue that Andy mentions in post #3 and have newer Magnecor wires and the problem goes away temporarily with new plugs- most recently on the front bank only. Could my ignition coil be the issue for one of those cylinders?
 
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