Fresh Ignition Cables
I've just installed brand new ignition cables in my 2010 3.7L.
Yes, some M/Y Hemi's, 4.7L and 3.7L have a single coil pack to plug with no cables in between. Other M/Y do have ignition cables installed. My 2010 3.7L have coil packs on the driver's side bank with ignition cables running to the passenger side bank, for a wasted spark type arrangement.
Something people don't realize, the super high voltages for spark plugs, traveling through the cables will create all sorts of EMI/RMI that interferes NOT only with the radio, but the sensors and electronic engine management. The is why ignition cables are NOT solid metal wires. To reduce the EMI/RMI they are usually some sort of flexible resistive conductor, like carbon impregnated latex, that makes them one long flexible resistor. Thing is, this conductor breaks down with time and use and you do NOT get a strong a spark from the coil.
So, at 118k miles, I've replaced the ignition cables, yep it was a noticeable difference. Even though I just did the plugs a month ago, with fresh cables the engine is idling smoother, seems to have a little more pep, and just the short drive today is showing a 1.5 mpg increase over more average (I reset the average mileage).
So, you've got a Commander with a year engine that has ignition cables and you've got close to or more than 100k miles, I'd consider replacing them!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.