Ok Im at a loss as to what is causing this issue. Just about every time I start my truck, hot or cold, it sputters pretty badly immediately after startup for about 2-3 seconds and then run finds. I have no cels, pending or otherwise. I have cleaned the throttle body, air filter, maf sensor, IAC (which is less than one year old), and used techron injector cleaner in the last tankful. My EGR and DPFE are also new and were cleaned including the ports in the throttle body. My sig is at the bottom but I have a '97 4.6 Windsor w/ 140k miles. The spark plugs are 2 year old motorcrafts. Remember this sputter is only immediately after startup and then goes away completely until I turn it off and have to start it again. I have checked my heater hoses and they are fine w/ no leaks cause I figured cyl 4 was gettin dripped on but its clean. ANY suggestions would be great! Thanks guys.

 

Could just be the cold weather and the high mileage engine.

 

have you cleaned the MAF sensor?? Opps missed the 1st read...never mind

check the temp sensor too..might be a touch out of wack.

check the fuel pressure also...the FPR might be iffy