Threw a code today

[Greccoroman]

I have an intermitant Misfire in cylinder 6. Code P0306. Has anyone ever had this before? I'm afraid it might be the coil pack. I'm going to try and see if it's the wire or the spark plug first by switching them with another cylinder and see if the misfire moves to a different cylinder. Has anyone ever had to replace the coil pack because of a misfire.

 

[AliasJerk]

why be afraid its the coil pack? its an easy and inexpensive replacement.

generally when a coil pack fails, its usually will cause the car to not run, you probably just need a tune up, spark plugs and spark plug wires would fix that issue.

when you pull the plugs check the gap on them to make sure they are within spec, I believe its .050 that ford suggests? it says it in the engine bay, I think on the hood IIRC.

 

[Smalls]

throw some plugs and wires on there. if the coil pack fails, you'll more than likely lose two cylinders and the problem will not be intermittent. when you have an intermittent miss on one cylinder, it is usually a worn out spark plug or wire

 

[huck finn]

found this:

What does that mean?

A P0306 code means that the the [COLOR=#009600 ! important][COLOR=#009600 ! important]car's [COLOR=#009600 ! important]computer[/COLOR][/COLOR][/COLOR] has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #6.

​

Symptoms

Symptoms may include:

• the engine may be harder to start
• the engine may stumble / stumble, and/or hesitate
• other symptoms may also be present

Causes

A code P0306 may mean that one or more of the following has happened:

• Faulty spark plug or wire
• Faulty coil (pack)
• Faulty oxygen sensor(s)
• Faulty [COLOR=#009600 ! important][COLOR=#009600 ! important]fuel [COLOR=#009600 ! important]injector[/COLOR][/COLOR][/COLOR]
• Burned exhaust valve
• Faulty catalytic converter(s)
• Running out of fuel
• Poor compression
• Defective computer

Possible Solutions

If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the [COLOR=#009600 ! important][COLOR=#009600 ! important]car[/COLOR][/COLOR], it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, [COLOR=#009600 ! important][COLOR=#009600 ! important]distributor [COLOR=#009600 ! important]cap[/COLOR][/COLOR][/COLOR]
, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the [COLOR=#009600 ! important][COLOR=#009600 ! important]exhaust[/COLOR][/COLOR], your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.