OK i have a 93' c1500 4.3 TBI truck, It has been hard to start you would have to floor it to start and when it did start it would run rough for a mins then stop? any ideas? also no it is running rough when driving mostly after i stop at a red light and i take of again it runs rough. I added some furl cleaner and it seem too stop the hard start for about a half a tank and now its back, there is no check engine light on and no codes

i'd get the fuel pump tested have you put in a new gas filter latley?