I just replaced my spark plugs, wires, distributor cap, and rotor button and as soon as I started my truck the service engine soon light came on. I used all OEM parts except for the wires which I up graded to a set of performance wires. I have checked all my connections and everything appears to be connect properly. The truck is running great. I had a lot of oxidation on the old cap which I will try to add a picture with the post to see if maybe there is something else going on to cause this problem. I need help with what to check next. I assume it is something simple I am over looking so any suggestions will be appreciated.