I am new to this jeep forum and I am seeking help. I own a 1997 TJ wrangler Sport. Inline 6 with an auto trans. I recently had tube fenders installed along with a 20" light bar. When I went to pick up my jeep after everything was all said and done, it would not start. Turn the key over, none of the gauges would even move. I was very confused with what was going on. After 2 days of brainstorming what could be wrong with it, I get a text saying it is running fine now, but nothing was changed. It just randomly started. After driving it for around 2 days, my CEL came on. NOTHING, mechanically is acting weird with the jeep. I had the codes come up 12,43,43,43,43,43. I know 43 is for a misfire but the jeep is running fine. I drive it daily with no problems. Recently the CEL has been flashing at random times. I am just wondering what could be causing this? I personally feel like it is electrical since the jeep is running fine. I am just looking for opinions? The only electrical stuff that had been done to it was getting the light bar installed, I had LED lights placed under the dash and for the dome light for my sound bar, and a fuel pump spliced in. Thanks for the input and help