I have a 1987 gmc sierra that idles fine but has no power off idle,did plugs, wires, cap,rotor and fuel filter with no change,maybe a distributor prob?

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Asked by Feb 14, 2014 at 07:35 AM about the GMC Sierra

Question type: Maintenance & Repair

1 Answer

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Sounds like a bad fuel pressure regulator or a bad fuel pump. Check for vacuum leaks also.....

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