the other day i replaced my stock intake with a new one . took it on a test drive sounds and feels great the only problem is when i punch it and let off the gas fast it makes a noise like a boat horn and its loud what could this be.
i have a 99 expedition xlt 4.6L and i have a knocking sound in the motor on driverside . it does it when idling and when i give it gas it gets louder what could this be thank for your help.
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