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Why is oil in the breather hose? - 1992 Oldsmobile Cutlass Supreme

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Thats not oil more than likely its fuel and that would mean that the diaphram in the fuel pressure regulator is leaking.Pull the vacuum hose off the regulator and look for fuel if any runs out of it then replace the fuel pressure regulator.If regulator is leaking it will usally cause the engine idle high.

Posted on May 25, 2011


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