my check engine light goes on while pulling a long grade and the goes off as i top off

Question

i have replaced my egr,map,o2 sensors,plugs,wires,cap and rotor,coil,alternator,fuel and air filter. had my injectors and fuel pump checked.

Answer 1

Hello. If the engine light is ON what do you get? You shouldn't replaced any more parts if you are not sure what the problem. Without the code you will be just guessing what the problem is.