there are several possibilities that could be causing your problem but I doubt with all certainty that your fuel line is causing the problem unless it is kinked. I am therefore assuming that you mean in general that there is a fuel delivery problem.
You might have a vacuum leak, faulty MAF, weak fuel pump, DME on the verge of puking, idle air control valve malfunction, valves out of adjustment ...etc
A dirty fuel filter could have an effect but most likely would cause a consistent poor running behavior or a severe bog upon heavy load. If you have high mileage without ever having replaced the fuel filter, I would recommend it anyway. What have you done so far to diagnose the car?
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