I have a 2000 Olds Alero, It started running really bad, Ruff idle,like it was running on 2 cyl. instead of 4. I have replace the two injectors that I was told that bad, coils, plugs. It has a new fuel filter, pump, tank. I am going out of my mind trying to find the problem, so if you could help me iI would be greatful....Thanks
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