Help. When the Cobra's engine is cold I don't have any problems with it firing up the first time, but after the car is driven and the engine is still warm after parking I have a hard time getting it fire up. When it does fire up after turning over and over the idle will sit at about 150 rpms until I give it some gas to bring the idle up to normal. Then everything is fine. I just changed the plugs a few months ago so I don't think this would cause the problem. Any ideas? Thanks.