I have a 2002 legacy GT. I put a new fuel filter in two months ago and the problem went away for a while. The car has problems only when I hit the 3/4 full mark. The car looses power and idles irradically and wants to stall. If I hit the gas it goes away for a few seconds. The plugs have 30 k on them and the wires are new. It runs fine on a full tank but like clockwork when it hits the 3/4 mark it acts up. The motor jumps up and down and idles crazy. When I fill up the tank it runs fine. I think the fuel pump is going bad. I have ordered a new one but don't know if I am waisting my money. The plugs have 30K on them and I have new plug wires. I can not figure it out. When it acts up I can feel the fuel line pulse both before the filter and after the filter. I am thinking to replace the filter tomorrow but don't want to throw away thirty bucks if it is not necessary.
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