bpc4him

Hey everyone! So when I go to start my s10, cold and hot, it turns over but about every 5 seconds the engine makes a clunk sound and stalls for a moment while the headlights dim and about 2 seconds later it continues to turn over and eventually starts. At times it will start right up no problem. For ex.Whenever I try to start the truck with a lil throttle it never wants to start. It just makes that horrible clunk soundand quits turning over for a few seconds. Also, when just idling, ifI punch the gas slightlythe engine dies.
Ivecleaned to air filter but thats about it. Couldit be faulty fuelinjectors? Please help!