2004 Ford Crown Victoria Gas milage

2004 FORD CROWN VICTORIA
125,000 MILES • 4.6L • AUTOMATIC
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04CVPI
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My car (Police interceptor)has been getting bad gas milage...I've replaced the fuel filter,Air filter,New spark plugs,New coil packs...But still get 17 mpg mostly highway(85 miles to a quarter tank..4.75 gal)driving but my friend with the same car (Police interceptor) gets 110 to a quarter...But my car does have an exhaust leak at the manifold cause of a broken bolt..And has a lot of idling hours...Could it be the leak messing with the o2 sensors or maybe I need to replace the sensors cause it idled alot?
Nov 18, 2014 at 1:29 PM
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HMAC300
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  • 48,601 POSTS
you need to fix the leak first then scan for codes.it will probably give you a converter code due to the air leak. That could effect your mileage.
Nov 18, 2014 at 6:33 PM