Hello Stang people, Stang (1989 LX nocthback 5.0) is sometimes acting funny at cold start up, although once it started hard after 1/2 hour of driving. (Smelled gas) I changed the fuel filter by the tank, put fuel injector cleaner in it and it was ok for a couple of days. (Thought I solved the problem) It's back, not as rough but Rpm is at 9 goes to 4 and goes back up and repeats. What makes it better is I try to get a steady idle and sometimes the rpms will go up and down without me moving the peddle. After car is warmed up a bit and when I get a steady, steady idle I can start my trip with no problems. Weather here in New York is starting to get cold and I think it may be a chock problem. If it is the automatic chock, where is it located? Car is always kept in great shape mechanically and cosmetically. Any input? Can't seem to figure out what’s wrong. Gas pump was changed less than a year ago. Thank you. T