I am in need of some help. My 01 cobra started to missfire on cyl 5 about 6 months ago. I have changed the plugs replaced the coil on 5 and moved the number 5 injector. The last thing I did is replace the plug that goes to the injector. The missfire goes away and runs good then it starts to run bad when it is idling. When I am driving it runs fine does not fill like it is missing at all. The thing is it will run fine then a week or two later it will start to run bad. Every one says I have a dead cyl but there is no smoke and it does not use any oil. Today I soldered the wires and it us running worse than before still getting the missfire on cyl 5 and now it smells like fuel. I am all out of ideas.