I have a 1995 F355 with 24k miles and now it won't start on the first try. The engine turns over but never fires, but if I turn the key to the off position then try to start it again it's fine. This is only on a cold start. With the engine warm it fires back up normally. Any ideas or suggestions? I tried resetting the computer via the battery knob with no luck. I'm not getting any trouble lights either. Thank you, Dan.