Wrong size plugs were installed.

2004 Ford Crown Victoria photo 2004 Ford Crown Victoria photo 2004 Ford Crown Victoria photo engine bay with aftermarket intake, blue couplers, and large air filter 2004 Ford Crown Victoria photo 2004 Ford Crown Victoria photo Red sedan on a car lift, hood open, showing the side profile and undercarriage 2004 Ford Crown Victoria photo 2004 Ford Crown Victoria photo Maroon 2004 Ford Crown Victoria parked in a garage with a mechanic working on the front. Garage has 'Cozzolino Maroon Ford Crown Victoria parked in a garage with a mechanic working on the front bumper Maroon sedan on a lift, front 3/4 view. Black grille with Ford emblem. Visible damage on front bumper Maroon 2004 Ford Crown Victoria on dynamometer 2004 Ford Crown Victoria photo Dyno chart showing power and torque curves with data points and run file information Dyno chart showing engine speed vs. power and torque 32photos in this albumView all

White 2004 Ford Crown Victoria parked on grass with trees in background 2005 Ford Crown Victoria photo White 2006 Ford Crown Victoria P71 side view White sedan parked on a residential street. It has a police-style spotlight on the driver's side mirror White Ford Crown Victoria sedan sliding on a dirt track White Ford Crown Victoria sedan in profile parked on a desert driveway near a Hummer 61,717photos in this generation1998-2011 Crown Victoria