Question about 2003 Lincoln Town Car

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Misfired cylinder 6, replaced coil, plug Misfired cylinder 5, replaced coil, plug Misfired unsure which yet, all of these happening within a week. It will run fine for a day or so after rep

2003 LINCOLN TOWN CAR 150k Misfired cylinder 6, replaced coil, plug Misfired cylinder 5, replaced coil, plug Misfired unsure which yet, all of these happening within a week. It will run fine for a day or so after replacing coil, then will misfire again. I've read through some if these solutions, what should be my next step? Thanks.

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Change all plugs with proper ones - they are picky for some reason - do not change number or brand from original - coils were probably ok, - get some injector cleaner and run through it but check for exhaust leak at e g r tube - is a common over looked cause of misfire - a thing to keep in mind is misfire isn't always spark issue. hope I was of some help

Posted on Apr 20, 2014


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Posted on Jan 02, 2017

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SOURCE: 1999 Town Car began running very rough - suddenly.

When cleaning your engine, water/degreaser went down the spark plug ports. Try using a air compressor blow gun to remove the moisture from around the spark plugs and boots. The water was causing the engine to misfire on 3 cylinders at first and as the ports started to evaporate the moisture, the less misfiring was occuring. Dry thouroughly and hopefully coils do not have damage to them. Also check to make sure the boot is making good contact with the spark plug.

Posted on Apr 09, 2009

  • 1 Answer

SOURCE: Check Engine Light is on and the code is P0303

Hello I need a help.
I have 1999 lincoln town car 4.6L V8.They have check engine light on. P 0303 cylinder 3 missfire.
I was changed spark plugs,fuel filter. check compression test 150psi. fuel pressuer 50.
swiching cylinder 1 to 3 fuel injector and coil. but they still have engine code

Posted on Apr 12, 2009

  • 155 Answers

SOURCE: 2004 Lincoln navigator misfire on cylinder 8 error code p318

Replace the coil pack once more. I went through 2 new ones on my f150 on one cylinder. One worked, the other didn't (both new off the shelf). Condensation build up in the boot caused mine to misfire. Anytime you replace a coil pack, squirt a little silicone grease inside. This will prevent condensation from hitting your plug. Fords are notorius for this problem, especially if you live in a humid area. Also, make sure and clear the codes after you make the repair.

Posted on Jun 10, 2009

  • 11 Answers

SOURCE: 2002 Lincoln LS misfire on cylinder 6.

A bad coil pack can foul out the spark plugs. I have also been told the computer might need to be reset for around $100. You must use Motorcraft OE plugs for this car to run at its best is what my mechanic told me.

Posted on Aug 05, 2009

  • 193 Answers

SOURCE: 1999 town car, check engine light code shows 3rd


Posted on Aug 14, 2009

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try replacing or cleaning the injectors
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Number 5 spark plug misfired

Bad spark plug Bad spark plug wire Do compression test Bad valve Bad piston

A code P0305 may mean that one or more of the following has happened:

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1 Answer

Cylinder #4 misfired on my 2003 chevy trailblazer

You didn't mention what engine size or really a question either but am just guessing that you may need help diagnosing the problem. I'm going to go by the most common engine in the Trail Blazer and that is the 4.2 liter 6 cylinder engine. There are several things that can cause a misfire in a cylinder but the 2 most common are either a bad coil or a bad fuel injector. The most common of those is the ignition coil. There is a separate coil for each cylinder and each of them are mounted on a spark plug. In the first picture you can see what the coil looks like and as you can see it has a connector and a boot on the other end that goes over the spark plug. Each one have thier own mount bolt as well. Also below is a picture of were each cylinder is at by number. I would just swap out coil number 4 with the coil for number 3 and put the coil that you got from number 3 and put it in number 4 (hope you got that) Plug all back up, clear any trouble codes, run the vehicle and if you end up now getttting a misfire in number 3 instead of 4 you know the coil is bad. If that doesn't work then you may be looking at an injector but there are several tests to rule that out that I am not going to post right now. I included some other pictures and instructions that should help. If you do happen to have the 8 cylinder engine (5.3 liter) this also has different coils for each cylinder but the set up is a litle different. If you need any other help or need the tesing procedures for an injector, feel free to comment/reply here or you can email me directly at with all your information and I will be happy to try and help. As I said the coil is the most common and I think this will clear it up once you diagnose it. Hope I was able to help.....


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