Spark Plug Problem! Need diagnosis please
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Spark Plug Problem! Need diagnosis please
Ok so I am new to the site and just have a minor question that has been nagging me. I have a 2000 f150 4.2L. Within the past week I have give nthe truck a tune up.. all the works. My problem comes along the lines of changing plugs and wires. Upon tuning up the truck, took it for a ride and the truck ran great. Came home took about a 30 minute lay off and went outside to start her up. Well upon starting nothing but a misfire and rough running. So yesterday I changed the wires and plugs again and upon start up the same result ensued. So my question is what is the diagnosis of this. Ok yes i replaced the ignition coil pack, so that is brand new as well. My spark plugs come pre gapped as usual, also not a compression problem, i have checked all wiring as well and nothing is loose. I am grabbing a scanner so i can see if any codes come up, engine light didnt come up upon either times of starting the truck. So any help would be appreciated thanks.
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