Question about 2003 Ford Expedition

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My 2003 ford expedition reads a code 305 cylinder misfire I change #5 cylinder but the engine still sputter and lose power. what can I do

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  • aztec74 Mar 14, 2011

    Yes. I will try it and let you know it any other issue

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It sounds like a bad injector. Swap injector with another cylinder and see if code changes.

Posted on Mar 14, 2011

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Posted on Jan 02, 2017

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2 Answers

My 2003 Dodge Dakota has trouble code 300 305 and 306


Here's a link on your code.P0305 is cylinder 5 and P0306 is cylinder 6. https://www.obd-codes.com/p0300

Apr 06, 2017 | 2003 Dodge Dakota

2 Answers

Misfire on number 6. changed spark plugs and coil, still reads misfire on number 6


What vehicle?

Spark plugs never misfire, by design, Wear yes,that stresses the
ignition modules

If you have a coil, that is for all cylinders,the others fire okey !

We need your year,engine, V6, V8, etc, to help

You never change parts to solve any issue
That is called wishing,hoping,pushing,poking,

What code # did you get PO306?

Dec 05, 2010 | Buick Rainier Cars & Trucks

1 Answer

I have a 2003 Expedition 5.4L Triton. Two days ago, with low gas (38 miles to empty), engine started running rough. Code read P0302, misfire cyl. 2. Since it had 113K miles, I figured its time to change...


Most likely the coils. Easiest way to check is swap them with another cylinder, start it, pull the plug wire connecter and if it doesn't change the engine the coil is bad. If it is the injector, then you can check it with an ohm meter. Touch the leads in the injector it should read 11 to 15 ohms. if you need help let me know.
Randy

Dec 02, 2010 | 2003 Ford Expedition

1 Answer

2003 Expedition engine light flashes on/off when eccellerating took to Auto zone, code was P0301, changed out plug and COP still doing smaething. It sputters when accelerating. What wrong with it?


First, are you certain you changed the plug for number 1? If so, check the power connection to the COP. If it is dirty or loose that can cause a misfire also.

Sep 14, 2010 | 2003 Ford Expedition

2 Answers

My 2003 ford expedition reads a code 0303= 3 cylinder misfire, which side of my vehicle would that be on and could replacing ignition coil and spark plug fix it and stop the lose of power and hesitation?


Third cylinder back on the passenger side. I'd recommend changing all 8 coils and spark plugs. These coils don't last long, and once one goes, more will fail soon after. This job also requires removing the fuel rail to gain access to the coil and plugs. I personally have the same SUV and went through the same issue!!

May 08, 2010 | 2003 Ford Expedition

1 Answer

Diagram of spark plug


Check this for 4.6 or 5.4 sizes engine...

2004 Ford Expedition 4.6 liter V-8 VIN "W"

f4f4c2b.gif


2004 Ford Expedition 5.4 liter SOHC V-8 VIN "L"

a5901ea.gif

Hope this help (remember comment and rated this).

May 05, 2010 | 2004 Ford Expedition

2 Answers

2003 expedition misfire on #5 cylinder...what should i do


Check the valves for that cylinder. Open the valve cover and turn the engine by hand and watch the valve as the 5th cylinder opens. Both the intake and out valves have to open then seal right back down. One of them may be stuck or burned out.

Dec 29, 2009 | 2003 Ford Expedition

2 Answers

Engine seems to miss / sputter between 30 mph and 50 mph. Really noticeable when going uphill at any grade. 2005 ford expedition 5.4l


Hi Nascar2nd.
From what you are describing it appears like an engine misfire.
These trucks are notorious for bad ignition coils.
They don't always set a code either, it depends on several factors.
To check these out in my shop there is a mode in our scan tool called "mode 6". This allows us to look at certain engine data parameters to look at misfire to locate the offending cylinder(s).
Unfortunately without the use of a scan tool you will not be able to see this.
It may be in your best interests to get a shop to look at this for you and verify the bad cylinder.
I have had issues with aftermarket coils and use Ford originals exclusively now. They have also reduced the price of them, good thing too because we go through many.
Might be an opportune time to replace spark plugs as well. worn spark plugs can accelerate coil failure as a worn plug takes more energy to fire.
Thank you for using FixYa !

Dec 02, 2009 | 2003 Ford Expedition

2 Answers

My 99 ford expedition 5.4 is running bad and it sputtering and shaking while driving?


you probably got a bad coil. The 99 5.4 has individual coils one could be misfiring, but you will have to hook it up to a computer.

Oct 07, 2009 | 1999 Ford Expedition

2 Answers

Engine light comes on. Code is PO305 #5 cyl mis fire.


po 305 is cylinder 5 misfire detected. I would check the plug wire for starters

Jan 30, 2009 | 2005 Chevrolet Colorado

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