2007 Honda Ridgeline Ignition Coils

 If compression checks out, then we recommend swapping the ignition coil from Cyl # 4 over to Cyl #5. You may have to remove the radiator fan to remove the ignition coil. You can bend it to quickly remove it, but be careful not to damage the fan doing this. Reset the ECU and drive until the check engine light comes back on. If the code moves to P0305, then you know for sure that the ignition coils are faulty. It's best to replace all 6 ignition coils if they are all 7 years old or especially original, and one fails, the only problem with doing this is that these ignition coils can cost $70-$120 each at local auto parts stores and dealers. We have the full set of 6 for less than one ignition coils in most cases. We don't reduce our cost by cutting quality. The number one question we're asked is "why are your parts so cheap?". We get our parts so low priced by purchasing several hundred to several thousand coils, just for the Honda Ridgeline. This allows us to get a true wholesale price, and pass it on to our customers. This allows us to get the same quality aftermarket parts as the brick and mortar stores, but at a much lower price. Not to mention, we include a lifetime warranty on these ignition coils which is good for as long as you own your Honda Ridgeline. This warranty covers the product and all shipping back and fourth. On top of this, we also include a full 60 days to return any unused product, because we know that a misdiagnosis can happen. 

 

2007 Honda Ridgeline Random or All Cylinder Misfires

 

It's also not uncommon to have one cylinder misfiring, but see P0300, or even a misfire code for all cylinders such as P0301, P0302, P0303, P0304, P0305, and P0306. When this happens, we first recommend resetting the ECU to force it to re-read a second time and it may properly read the misfire. If it still shows the same thing, we then recommend unplugging each coil while the engine is running. Do not life the coil up and off, just unplug the connector. This only works if one ignition coils is completely non-functioning, and the engine already misfires while at idle. If the ignition coil you unplugged is good, then the engine will misfire even worse or stall. If the ignition coil you unplugged is bad, then there will be no change. Sometimes the changes can be very subtle changes, so if you can't tell if there was a change, grab a cup of water and put it on top of the engine in a secure spot (to make sure it doesn't spill!) and you will certainly see the water vibrate if there is a change. The other 2 ways are spark tester, or removing each coil and spark plug, connecting the spark plug back to the coil and touching the tip of the spark plug to a good ground. Then you can have a friend crank the engine over and you will be able to physically see the spark if the ignition coil is functional.