What Is a Bad Ford Expedition Ignition Coil?
The computer records and stores the misfire. It can be later reviewed by you or the individual fixing it. To find out if you really have a substandard ignition coil, several owners swap the ignition coil over to an additional cylinder. This technique works exceptionally but do remember to reset the computer/PCM while performing it. You can unplug the battery for 60 seconds or use an OBDII scanner to reset it. Swapping the coil will not be enough if there is no constant misfiring. One thing to remember for sure, if there is misfiring on Cylinder no 3 occasionally, it will display P0303 after swapping it with Cylinder no 3 and scanning too quickly. So give some time to the computer to find misfire on the other cylinder.
Misfire Symptoms For Ford Expedition
Misfires are of two kinds. One is not so powerful. The ignition coil misfires now and then but still functions. In the other one, the coil dies completely with no functioning. It is easy to check whether your ignition coil is dead or not. Check the engine light for codes; you will notice it immediately. Owners drive themselves crazy because of the mile misfire. Over and over, these misfires occur, but there is no check engine light. Owners can feel them, but due to no check engine light, they do not know the cause of the problem. We can scan your Expedition for these misfires to acknowledge the issue before the check engine light turns on through a Mode 6 scanner. It will track those spooky misfires that bother you but do not pop up on the engine light. Expedition owners reported the misfire mainly while accelerating or towing. While cruising, misfires were either negligible or in-existent. Owners reported them as bouncing or stammering. It is possible that you will not see any physical damage when the coils fail in your Ford Expedition. Often, the epoxy resin (the black glass-looking stuff) can snap and cause the spark to arch out.