The nice thing about it is that the P0302 has tracked the problem to a particular cylinder, which makes diagnosing the problems simpler than , which means that the cylinders are randomly misfiring. You should also feel the vehicle is down on power as well. Replacing a set can be very expensive. Now, when you first pulled the plug from Cylinder 2, if it wasn't wet or smelled of fuel, chances are Spark is not the issue. That being said, the plugs are a great place to start. The P0302 code means that the cylinder 2 is misfiring or is randomly misfiring. The cylinder to the left will be 1, and the cylinder to the far right will be 4.
Otherwise, check the coils a. Trouble code P0302 means: Cylinder 2 misfire detected I had the same code. The currently selected is for the Ford makes. It takes all 4 ingredients to fire a cylinder - Air, Fuel, Spark, and Timing. This is definitely not the place to start. Use a long handled screwdriver touching one end to your ear and the other to the top of the injector if you dont have a stethoscope.
The P0302 code means that the cylinder 2 is misfiring or is randomly misfiring. P0302 Trouble Code Diagnosis- Ford Focus There are quite a few things that can cause the P0302 trouble code to trigger the Ford Focus. The other two are Phillips head plastic screws located in front of the strut. It may take several dozens of miles for the on-board computer to re-learn your driving habits. One screw has a torx head and is located at the front lower edge of the fender. Quick action may also save your catalytic converter from ruin. If a code appears with P0303 the last digit refers to cylinder number , then you have found the culprit - bad spark plug.
It is likely not a timing problem in your case, because timing affects all cylinders, but I thought I would just mention it since Timing is an important part of combustion. Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. If your are for a different car, select that vehicle series before searching for the diagnostic codes because not all used by one manufacture are used by the other makes. . If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders i. Also bad news and time consuming and difficult task for a shade tree mechanic.
Also bad news and time consuming and difficult task for a shade tree mechanic. The solution is here : Ford Focus P0302 Possible Solution : Disconnected, dirty or fouled spark plugs are common causes for engines that won't start. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. Lets hope not, because when Air is the cause of a misfire, it is usually an expensive fix. You can always reset the trouble codes and swap the coil pack, wire, and plug from Cylinder 2 to another. If you do, your spark plug and wire are okay, the problem lies somewhere else.
Check ignition module, coil, spark plugs and wires. Apr 28, 2014 It takes all 4 ingredients to fire a cylinder - Air, Fuel, Spark, and Timing. Ford Focus P0301 Definition P0301 is a cylinder specific misfire code, which means that cylinder 1 is misfiring and causing the code. With the three cover screws removed, pull down the front portion of the fenderwell cover. You will need a pen or the tip of a key to push the buttons if like mine. No clicking or irregular clicking means fuel injector is not working no sound or is not working properly.
You should also feel the vehicle is down on power as well. Most Common P0301 Fixes If you follow the items listed above you should be able to fix the P0301. The vehicle service manual should be consulted for more information on possible causes of the fault, along with required testing. Enter the 5 character trouble codes in the search box and submit the search. The other two are Phillips head plastic screws located in front of the strut. If a code appears with P0303 the last digit refers to cylinder number , then you have found the culprit - bad spark plug. If it drops you have a vacuum leak; if it doesn't drop, you have a fuel delivery problem likely a dirty fuel injector.
If the P0302 code comes back, swap the coil. Spark plugs typically need to be replaced every season or 25 hours of use. We are not responsible for any actions you take on your vehicle. To confirm, swap it with a known good cylinder - example 3 cylinder. Again, if it appears on Cylinder 3 - the plug wire is the culprit. I'm going to assume you have a code reader. Any of these things are bad news and expensive to fix in a shop.
The factory pre-programmed data contained in the memory chip cannot be changed. See where this is going? Most vehicles now come with iridium plugs that need changed very infrequently. Replacing a set can be very expensive. First, raise the car with your jack placed behind the front tire. They are preset at the factory and if you stick a feeler gauge in them, you'll scratch the platinum and they will not fire correctly.