If your Challenger has not been started for a week or more, do you ever hear lifter noise while starting it on a cold day? To avoid this problem, do the following: *Hold accelerator pedal to the floor *Crank until oil pressure indicated *Release key or button and let starter shut off *Crank with foot off accelerator pedal and it will start normally. (Note- Holding the pedal to the floor shuts off the injection system to clear out engine in the event of flooding it).