2 people reported this problem
Abnormal sound from engine on Ford Crown Victoria
2 people shared problem details
Hooting, moaning sound similar to ship's horn or foghorn coming from engine. Sound initially only happens for brief periods during warm up, but then occurs during driveaway & while idling at red lights, stop signs, etc. Sound originates from the IAC Tube that connects the Idle Air Control Valve to the air intake tube. Fix is addressed in Ford Article 94-22-4. Problem is the factory IAC Tube. Original tube needs to be replaced with a re-engineered one that has a 'silencer'/'muffler' built into it. The new part number is F5AZ-9H308-A.
1999 Ford Crown Victoria100,000Visitor
After engine gets to normal operating temperature, I get rough engine running at about 30 mph....
engine sounds like it has rocks in the bottom, may be its crankshaft, and i think the motor is...
My engine stumbles at low cruising speeds between 30-50mph, it feels like a misfire but there a...
engine runs cold even after a new thermostate is installed