1993 Ford Explorer 2 WD mileage: 107,000. I have noticed a hissing sound coming from the fuel pressure regulator port located on the fitting where several vacuum hoses connect to the intake manifold. This port has only a cap on it, I replaced the cap but the hissing is still there. I can push on the cap and the hissing is reduced but what can cause this?
Wednesday, January 2nd, 2019 AT 7:06 PM
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