Hey guys I wondered if anybody in here has some input on a mechanical reason for my 02 5.3l not wanting to idle on it's own without help for 30-40 seconds when it's a cold start. The reason I'm askink what could be causing this mechanically is because I've had my computer tweaked 3 times the latest time by Nelson and every time the problem remains. It's the only thing keeping my truck from being mechanically perfect. Thanks in advance for any input