It sounds like your wires arent connected properly. are you sure the boots are properly seated? if this isnt it, check the gap. also, see if you can tell which cylinder is mis firing, it will make it easier, that way you dont have to check all plugs and boots.
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this code identifies that the computer in your vehicle has picked up that cylinder 3 is not fireing properly so i would say change the plug in cylinder 3 if not cured change the plug lead if thes dosent work then distributer cap or the electronic distributer check all these things in this order its just elimination really
Try this, wait for the dark of night. Start your engine ,open your hood and look closely at the spark plug wires. If you see sparks jumping over and across the wires change the spark plug wires. They are probably old and worn. While your at it change your spark plugs. Your car should run one hundred times better after this small and easy repair. GOOD LUCK.
The timing is not settable in a traditional sense of the days of distributors. The spark timing is controlled by the computer. If the computer is getting a bad signal, your spark timing will be off. Generally, a mis-fire isn't caused by bad spark timing. A sticking fuel injector, a bad or improperly seated spark plug wire, or a bad sensor will cause your mis-fires.
Hello,the problem there is not a good spark in the compression chamber,so that it will develop a bad miss firing and you will not have a good acceleration.I advice you to change change all the spark plugs wire ,the wire lose the spark.Hope that help you
i dont know if this 402 code is a miss code on a jag but usually miss codes are p0300 codes. if you are hearing a ticking and you own a spray bottle, an old mechanics trick is to mist water on the plug wires while the engine is running preferrably in the dark.
could be a wire crossed, or it's out of time. since you used motorcraft plugs, did you set them properly to the correct gap? replacing plugs without gapping them can cause the sluggishness, out of time can cause the mis-fires and rough running.