I have an 1996 jimmy, I am getting these two codes. It idles badly, so I figure its the fuel pressure regulator. I took the fuel meter body apart, I tested the regulator with a vacuum pump and I seems fine. Is there a certain way to test it. I figure if it holds vacuum its alright. I can't figure it out. I have it apart right now, if anyone can help, please help me! Thanks, Larry.
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