The Engine Idles Rough and Vibration is noticed while driving.
In some cases the Vibration increases as the Engine is warmed up.
The most common cause is a faulty ignition coil, This truck is 5.4L engine has this truck has 8 of them. All 8 are the same part number. If you have a check engine light, Have the codes read, and they will indicate the cylinder that has the bad coil, If you don't have a check engine light, which is common on Fords, you can start on cylinder one and install the coil. If the truck runs the same, put the old coil back in and move on to the next cylinder. Repeat until you find the cylinder that when the coil is replaced, the truck runs better. Another option is to unplug each coil, one by one, and look for the engine to change the way its running. If the coil is good, the engine will change when it is unplugged. If the coil is bad, there will be no change at all. Between those 2 processes, they should lead you to the faulty coil.
This details will help.
Thanks.
In some cases the Vibration increases as the Engine is warmed up.
The most common cause is a faulty ignition coil, This truck is 5.4L engine has this truck has 8 of them. All 8 are the same part number. If you have a check engine light, Have the codes read, and they will indicate the cylinder that has the bad coil, If you don't have a check engine light, which is common on Fords, you can start on cylinder one and install the coil. If the truck runs the same, put the old coil back in and move on to the next cylinder. Repeat until you find the cylinder that when the coil is replaced, the truck runs better. Another option is to unplug each coil, one by one, and look for the engine to change the way its running. If the coil is good, the engine will change when it is unplugged. If the coil is bad, there will be no change at all. Between those 2 processes, they should lead you to the faulty coil.
This details will help.
Thanks.
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