2006 WQ running rough.

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I have a 2006 WQ LX. Recently it feels like i have had dirty fuel going through the car. It loses power then picks up again. Travelling in 4th gear it feels like its chugging along, slightly jerking back and forward. I have had new leads and plugs put in also. I am thinking it may be the throttle body from my own investigation. Does anyone have any other ideas as to what it may be? Thanks.