Question about 2002 Ford Mustang
Car runs rough on ildle and aceleration cylider 3 misfires i changed plug wires and spark plugs filled with gas and gas treatment
Install a new coil pack-Denny
Posted on Dec 29, 2013
I would move no3 injector to another cylinder and see if the fault moved . If not the problem is in the injector wires or ECM plug If it moved I would consider a new injector .
Posted on Dec 29, 2013
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Posted on Jan 02, 2017
SOURCE: engine misfires
You didnt mention having changed the spark plug wires, so that is another item that could be culprit as well. As well, it could be a coil pack that is not working properly.
I cannot recall at the moment if that model year uses coil on plugs or if it uses coil packs. Either way, if it uses a coil on plug set up, take the one for the #3 cylinder and move it to say #4 or anyone of your choice and see if the misfire follows
If it uses coil packs, there is likely one coil pack that controls two cylinders. In that case just swap the coil pack with an adjacent one and see if the problem follows. Pay attention to where the spark plug wires go because it will be an issue if you get them mixed up. You just swap the coil packs around.
I would, however, start with the spark plug wires if you have not changed them already.
Posted on Dec 31, 2008
When you change the plug what color is the tip of the old one? This could be the answer to your problems. It should be a light beige or tan if everything is working properly.Just take one of the old plugs down to your local garage and get the mechanic to have a look at it. He'll be able to tell you why it keeps misfiring. Hope this helps.
Posted on Nov 29, 2009
had the same thing with my crown vic on the #8 cylinder. changed plugs and wires. still missing. wound up replacing the coil pack. you can check resistence of the coil between companion spark plug towers. ford marks each tower with 2 cylinder #'s. resisistence should be around 10-12 ohms
Posted on Mar 15, 2010
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