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Easy job. Remove bolts holding coil pack. Disconnect Plug from Coil Pack. Remove sparkplugs. Check Gap on new plugs. Install them and put the coil pack back on. Just did it myself last weekend.
you are saying it is getting spark, and fuel, right? If it is getting spark, and fuel in to the throttle body, check compression-make sure the Mass Air Flow sensor is plugged in, and double check your spark-you say you replaced all those ignition items, but do not say that you have spark.
P0301 - Cylinder 1 misfire detected........P0302 - Cylinder 2 misfire deteced, and so on........so either it is a current misfire, which you would be running on 4 cylinders instead of 3, or it is an intermittent problem.......i will provide some possiblities,,,
- ignition system (spark plugs, leads, coil packs)
- fuel system (injectors, ecu etc)
- running out of fuel
- low compression
Basically, if your vehciel has not had service for a while, change the spark plugs, and engine oil, and give her some loving, tender care....
However, if it is regularly servicedm there might be a bigger problem.....
Start with the basics...meaning check the spark plug wires and spark plugs. While under the hood, inspect all hoses for a vacuum leak(s). Then turn the ignition key on-off-on-off- on...leave in the on position and write down the number of flashes the check engine light indicates....2 flashes = #2....pause.....3 flashes = #3.
Let start from here. Are you able to perform engine repairs or diagnostics???
On a 6 cylinder, they are located on the left side of the . There is a power pack with the spark plugs attached under it. There are 4 bolts that hold it in place and the power pack feeds the spark through to the plugs under the power pack.
Check your spark plugs. Without good spark plugs the ignition won't ignite. Just go look for Jeep spark plugs at like AutoZone and they are real cheap. To change them you will need a long socket wrench to twist them out and change each one.
Code P0301 is a generic OBD Code for Misfire. It also indicates you have a misfire in the #1 Cylinder. I would start by checking the plug wire to make sure its clean and on all the way (at the coil as well). Then if that doesnt help I would pull the plug out and check the condition of the spark plug. hopefully this will give you some direction. Thanks for Using FixYa!
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