i reciently replaced my fuel injectors on my 1979 280e.eversince then i have had warm startup trouble. i never had problems with the old injectors. i ordered all the parts from *********************** and i replaced the in jectors just exactly as they came out. i ended up not using the o-rings because my old injectors didnt have them on and i couldnt figure out where they went. i also crack my valve intake hose and mickey moused it until the new one gets here. and another thing i didnt unscrew the cold start valve fuel line , could this be a reason there still might be air in the system? any help would be appreciated.