Coolant temp sensor or IAC are my guessesI have the same problem, plus some extras. I have a 1993 Nissan Maxima SE Automatic. You need to press the gas pedal to the floor to start it. I have new Injectors, New plugs, New Fuel Filter and Air filter. This happens most of the time but the other 25% of the time it starts well. Also randomly it seems to go back to it's bad injector habits (rough running and bad fuel economy) Any help would be great.