Question about 2007 Ford Crown Victoria LX Sedan

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2003 Ford Crown Vic Misfire

Misfires and loss of power at higher speed. Misfire random on code reader for cylinder 1,2,5,6,7.
Plug/wire replacement potential resolution?

Battery light on continually

Brake Light (Emerg brake) on with brake released.

Recent purchased, ex police car, no other info known.

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  • rbressler32 Jan 08, 2009

    109k on mileage. Maintenance was completed routinely by shops. Police Department vehicle until 11/2008. Just purchased yesterday am trying to make sure I didn't get overly ripped off.. Only codes on Diag Tool were random misfires on those cylinders.

  • rbressler32 Jan 08, 2009

    yeah, I'm an idiot. Brake light was on because pedal was down. I don't feel that there is any tension behind it, perhaps disengaged. On occasion when hard accelerate attemp (stepping on it) it does not give the "push in the back of the seat" acceleration feeling.

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IF its a police crown vic with about 100K on it replace the crank shaft position sensor. That sensor can multi mis-fire, rough idle and starting and stalling issues. That sensor can baffle the best on this car.Our first time was on a 1996 with about 99K on it.Towed in to the dealer because I could not figure out why it would not start. Took the dealership days to figure it out. Its cheap about $20 and should be replaced in all 100Kmile police vics anyway as we found them to go out normaly about that time under police driving habbits(long idle times) and it can also leave you dead in the water if it fails completely!

Posted on Jan 12, 2009

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Milage on this shouldn't matter, the light being on is probly just stuck, however you maay wanna check to be sure the brakes aint hangin up a little,

Also the surging can be causeed by the fuel pump goin out, may not be the case but something to look for, it will show up as random misfires as well, maybe try a good fuel addative, (could have a little water in it, check the fuel filter as well, alot of cars now days have a charcol filter and when they go bad they can be a issue, Pick up tube could also have a hole in it, the fuel pumpo on theese cars should be in the tank and are not fun to replace,

hope one of theese suggestions helps, there are many thing that can cause the problem your describing

Posted on Jan 08, 2009

  • biggreen71 Jan 08, 2009

    sounds to me like it is either in your fuel or just in need of a tune up, be sure to look for vaccume leaks as well, that is another way to end up with bad miss fire, you can take a little carb cleaner and spray around the intake, (or plenum on fuel injection) and if it idols up you know theres a leak in that spot, usally you can tell just by lisnining, you will hear the air.

    for any car you get the best thing you can do is give it a full tune up and fluid change first thing, try this first then go from there


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Usaly plugs & wires but I would get that coil tested before I do wire and spark plugs! if coil is good wire and plugs! hi milage???

Posted on Jan 08, 2009

  • John Jon Jan 08, 2009

    glad i could help you out! take care

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