94 C1500 4.3L vortec engine codes 13 and 44
13=Heated Oxygen Sensor (HO2S) Circuit
44=(Lean Exhaust Indicated)
The engine light comes on after driving down the highway a little bit. It was doing this and It just blew an engine. Just got done putting another one in and its doing it again. What could be causing this?
I've replaced the fuel pump, filter, fuel lines, sending unit. I'm not sure what else it could be???????