Question about 2003 Ford Crown Victoria

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I replaced the intake manifold on 03 crown vic and now cylinder #8 misfires

I replaced the intake manifold on my 2003 crown vic and now it runs bad with a slight knocking sound on drivers side of engine and cylinder number 8 is misfiring.

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Posted on Jan 02, 2017

  • 69 Answers

SOURCE: P0304=misfire in cylinder 4. coil?

not coil coil it wouldnt fire at all it is either a plug or a wire replace the wire and plugs and that will fix it

Posted on Oct 06, 2008

  • 261 Answers

SOURCE: Ford Crown Vic p0300 random cylinder misfire

take a look at the EGR valve it could be either vacum controlled or electronic either way what seems to be the problem is that the valve is stuck in the open position until the engine warms up you can gently tap the egr valve with a small hammer or a screw driver and you can see that it runs smooth, now if the egr valve is vacum controlled replace the valve. if it is electronoc controlled replace the valve and the module for the egr valve.

Posted on Nov 24, 2008

  • 4 Answers

SOURCE: 2003 Ford Crown Vic Misfire

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

  • 2 Answers

SOURCE: 2003 Crown Vic Misfiring after acceleration

I just came up with that exact issue in my 2003 with 98K police crown vic. And the last time I had this issue in a 2001 police Crown vic it was the crank shaft position sensor. A $20 part and about 30 mins to put it in. located near the bottom of the engine. I had to un bolt the A/C compressor and push it out of the way a few inches to get to the sensor. If you have about 100K mile on it and its an idled heavy police car, this sensor should be changed out anyway. It can leave you on the road dead and some dealers have a hard time find out whats wrong as the OBD 2 does not see it as a problem when it goes bad or becomes touchy as I think mine is.

Posted on Jan 12, 2009

  • 3600 Answers

SOURCE: 1998 crown vic police. Had check engine light with

your egr on that side is dirty try cleaning it aslo check intake boltsaround those clyinders.

Posted on Jun 21, 2009

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2 Answers

My 05 Crown Vic LX is misfiring Cylinder 1 2 and 3.


Your next step would be to check for injector pulse (signal at injector) and are the injectors working. Is the miss while driving, at idle, under load, or decell? What codes are u getting?

Oct 22, 2014 | 2005 Ford Crown Victoria

1 Answer

My 1996 Crown Vic. recently started to buck and backfire a bit, turned out to be a misfire on #4, have been looking into it with a bit of progress but not complete success


I have faced the same thing with my car, this is not a single answer to this problem. It could be a bad boot on the coil pack, it could be a improper coil install, sometimes the spring does not sit in well, it could be that the intake manifold is leaking, it could be that the egr valve is stuck, it could the exhaust manifold is leaking, sometimes these issues are not caught by the OBD 2 sensors, you can try to move the coils around to see if that works out.

Mar 17, 2014 | 1995 Ford Crown Victoria

1 Answer

P0307 code on a 2005 crown vic


Cylinder misfire on #7.could be bad spark plug,or bad coil.try replacing coil and plug at# 7. It is the second last plug on the driver's side. If you pull the coil out and there is antifreeze in the spark plug hole,you may have a bad intake gasket or cracked intake manifold and the antifreeze is shorting the coil out. In that case you may have to replace the intake manifold.

Dec 19, 2013 | 2005 Ford Crown Victoria

2 Answers

I have a 1996 crown vic i need to know these touble codes po305 po304


P0304 means that cylinder 4 has a misfire and P0305 is a cylinder 5 misfire. What this means is you may have bad spark plugs, or bad plug wires, or you may need to replace your distributor cap and rotor. I would start with plugs and wires.

Oct 21, 2010 | 1996 Ford Crown Victoria

2 Answers

So this is my problem....i own a 2004 crown victoria unmarked police unit. it all started when the check engine light came on. i got the code, it said something about the spark plugs. i changed all 8 with...


possible bad rings, i would put some motor tune-up in oil will clean carbon off rings, its made by company called seaform and is called motor tune-up, put hole can in oil and drive for about 30 days ,its good stuff can also use in fuel to clean injectors, could also have worn out valve stem seals causing oil to leak pass valves into cyl

Feb 05, 2010 | 2003 Ford Crown Victoria

4 Answers

Cylinder 4 misfire on a 2000 crown victoria interceptor


first cylinder 4 is the last on the passenger side . first pull the coil out and check if there is water where the plug is. if there is take the water out and dry up the coil. if you find water you got a crack manifold or a bad intake manifold gasket. if there is no water replace the coil. good luck

Apr 10, 2009 | 2000 Ford Crown Victoria

1 Answer

2003 Crown Vic Misfiring after acceleration


I just came up with that exact issue in my 2003 with 98K police crown vic. And the last time I had this issue in a 2001 police Crown vic it was the crank shaft position sensor. A $20 part and about 30 mins to put it in. located near the bottom of the engine. I had to un bolt the A/C compressor and push it out of the way a few inches to get to the sensor. If you have about 100K mile on it and its an idled heavy police car, this sensor should be changed out anyway. It can leave you on the road dead and some dealers have a hard time find out whats wrong as the OBD 2 does not see it as a problem when it goes bad or becomes touchy as I think mine is.

Jan 12, 2009 | 2007 Ford Crown Victoria LX Sedan

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