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hissing

  1. Possible Vacuum Leak

    I have a 1998 Ranger 4.0 (OHV) I hear a hissing sound when I accelerate ... -Similar sound to air coming out of a tire -Seems to be coming from somewhere near the gas pedal (not sure which side of the firewall -It definitely gets louder as I accelerate more and makes no sound when idling -I am...

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