From the spark plugs to the ignition coils, many different things can cause an engine to misfire. The most common causes of misfires are worn, improperly installed, and mishandled spark plugs,...
For a cylinder misfire problem, you need to change components, such as coils, spark plugs, etc. to isolate the root cause of the misfire. Also, make sure you jot down the other codes, as misfire can be caused by a malfunctioning component or system. Here are the four different types of misfire and how to diagnose them: Ignition Misfire
Feb 18, 2007 · At the time when I replaced all the spark plugs, I also put on 8 new coils ($$$). Believe me, we greased the hell out of them. Not only where the coil comes into contact with the plug, but also where the rubber boot connects to the plastic piece because I had issues with moisture getting in there previously.
Failing spark plugs can cause the car engine to misfire and thus affect its performance. A single spark plug that fails to ignite the fuel-air mixture can cause a halt in the running of the engine. It can result in incomplete combustion and damage to the catalytic converter of the car. Starting Trouble Faulty spark plugs can cause the car to exhibit starting troubles.
Oct 16, 2014 · The spark plugs need to be torqued to 20NM. The original plugs didn’t look too bad, so I think the coil was at fault, a new set of plugs won’t hurt though. I might ask the MINI dealership to give me the new set of plugs the car is due to have when it goes for the final TLC XL service in 6 months. With new plugs and the secondhand coils in ...
Can result from: inoperative exhaust gas re-circulation system, defective detonation sensor, lean air fuel mix, incorrect fuel octane rating or spark advance and loose fitted spark plugs; Effect: Misfire and/or general poor/ uneven running which may result in engine damage; Remedy: Identify the cause and replace the spark plugs
So I put some NGK Iridium COPPER CORE Spark Plugs gapped at .030. It smoothed the problem but was still misfiring above 3000 RPM's. So I worked my way back. I tested the MSD 8.5mm Spark Plug wires for resistance. MSD spec is 40-50 ohms per foot and all but two wires were within spec.