How to test the coil packs

  • 2008 DODGE NITRO
  • 4.0L
  • V6
  • 4WD
  • 133,333 MILES
On the car listed above how do I get to and test the coil packs? I don’t have a scan tool is there another way to test them?
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Friday, October 25th, 2019 AT 7:52 AM

1 Reply


In the diagrams down below I have included a diagram of the components of your ignition system along with the pinouts of the electrical connectors to the ignition coils. All 6 are going to identical to the number 1 coil connector which is shown in the diagrams. I have also included a description of all the components in your vehicle's ignition system. I have also included the directions for the removal of each individual coil. The installation is the reverse of the removal instructions. To test each coil you will need an assistant to help. Remove the coil you wish to test. Remove the spark plug from that cylinder as well. With a hose clamp and a wire connect the bare, insulation stripped end of the wire to that spark plug where the socket fits over it. Tighten the hose clamp tightly so that there is metal to metal tight connection with the wire and the body of the spark plug. Take the other end of the wire, stripped and bare and connect it directly to the negative battery terminal. Insert the spark plug into the coil just as would be if the spark plug was in the car. Stand away from the spark plug and have your assistant crank the engine. He spark plug should produce a nice blue/orange spark. Please test each individual coil this way, one at a time, reinstalling the already tested spark plug and coil as you go, and report back with what you find. We can go from there.

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Friday, October 25th, 2019 AT 11:32 AM

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