Question about Ford Mustang

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Just put new spark plugs in my 06 4.0 mustang. i gapped them correctly. but it still sounds as if it is misfiring. i looked at the order of the spark plug wires and it goes 1-2-3-4-6-5. should 5 and 6 be swapped? what should i do. i also have new sprak plug wires to put on but need to solve this problem first

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Jeff Hammack

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My information says 1-4-2-5-3-6. You can call your local dealer, ask for the service dept. they should tell you. But I think this is correct. Hope this helps.

Posted on Aug 09, 2010


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6 Answers

Changed the spark plugs in my 2002 Suzuki xl7 and now it won’t stay running. Drove fine before I changed plugs. Sounds like it is missing.

Did you set the gap on the new plugs to factory settings before putting them in? If not, they may not be the right gap.

Also, any number of other issues are possible such as:
1. Wrong plugs
2. Damaged wires when removed from old plugs
(Plug connector wires can be easily damaged when removing from old plug if just pulled off and special tool isn't used.)
3. Stripped threads on plug allowing gas blow by and poor compression.

No. (2) seems to be the most likely cause without knowing anything else. A new set of ignition wires after 15 years of service is not something frivolous to do and money well spent.

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cylinder 1 misfire --pull plug and look at it for proper gap- damaged plug -was old plug damaged --check coil for proper working order wire hooked up correctly-wire connection --injector working properly

Aug 02, 2015 | Ford Cars & Trucks

1 Answer

2006 Mustang 4.0L P0304, new plugs, new wires, new distributor. what next?

Reset the ignition timing, to the manufacturers specifications.
Remember the gap for spark plug must be according with the manufactureer speci. Otherwise you must have the same problem

God bless you

May 10, 2012 | 2006 Ford Mustang

1 Answer

Just put new spark plugs but the problem is there

For spark plug problem, click the help links provided below: ---
Car has no spark?

How to Replace Spark Plugs?

Car cranks, has spark but will not start?

The spark plug firing order for car?

How to gap spark plug ?

Spark plug Replacing for?

How to identify number one spark plug on the distributor cap?

How does the spark plug wire go on the distributor cap?

Spark plug Firing Order Diagram?


This will help.

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2 Answers

Misfiring after replacement of spark plugs and wires

If it wasn't misfiring before. Make sure you have the proper gap on the spark plugs. Make sure you have the wires connected in the correct order. If you have the old wires, you may want to end up trying those one at a time to make sure you don't have a defect wire either.
Thank you,

Mar 04, 2011 | 1994 Ford Escort

2 Answers

I changed the spark plug , the wire set the rotor, the rotor cup, and the fuel filter ,my nissan pathfinder 1989. when i start the engine , it run erratically for a while and suddenly it stole, it has a...

you need to get a diaghram on the firing order of your spark plug

wires, almost any autoparts store will give you the firing order for

your vehicle. if the firing order is incorrect the engine can sound

like its falling apart. the spark plugs also need to be gapped

correctly, they are not always pre-gapped or check the gap of

one of your old spark plugs and match the gap with the new ones.

good luck!

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1 Answer

Misfire in cylinder1 and 4 new i put on a new coil and it still isnt firing out of the new coil in 1 and 4

Misfires are either fuel/air mixture or spark.

If you've got the spark, then start looking at the fuel/air mixture. Check the plugs to ensure that they are in good shape (no cracks, not discolored, properly gapped).

Double check the plug wires and firing order... if everything checks out, then you could be having a vacuum problem such as an intake gasket leak.

Good luck!

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Make sure the parts guy sold you the right spark plugs for your car. Make sure you got the right gap and make sure you put the plug wires back on securely and in the correct order.  I usually do one plug at a time so I don't mess up the order.

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1 Answer

Lack of power

These engines are pretty sensitive to the spark plug gap. Try replacing the plugs and making sure the gap is correct (even if they're pre-gapped. They're typically 0.055", but there should be a sticker under the hood that states the actual gap.

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Change sprks plugs on volvo S60 2.4 t ......

Did you set the plug gap correctly?Improperly gapped plugs will cause the spark to be to cold or to hot and can cause misfire of the fuel wich would explain the vibration,this could also be caused by the wrong heat range on the plug.Check what spark plugs Volvo reccomends and the gap.

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