I have a 99 cavalier and it wont stay running.. we changed fuel filter and o2 sensor and checked fuel pump?

the fuel pump is good and it isn'tt the oxygen sensor. i really need my car does anyone know anything.. please dont leave anything dumb i only need help not sarcasm.
I have a 99 cavalier and it wont stay running.. we changed fuel filter and o2 sensor and checked fuel pump?
Did you check your fuel pressure regulator? Fuel filter? Have a kinked line somewhere or other restriction? My gut feeling (which isn't always right, but often is) is that fuel is somehow restricted or choked out. I am assuming that you could keep the engine running if you kept your foot on the gas pedal.



Next thing is a vacuum leak... look at the line going to your PCV valve for starters, then inspect all of the vacuum lines going out of the intake manifold. Check any elbows (sharp bends) in the hoses for cracks. Make sure they are all firmly seated on whatever they are connected to. A leak in the line going to your PCV valve, for example, can cause your car to sputter and die out at an intersection. Make sure your PCV valve rattles when you take it out, or else it's not working.



Check your air intake to make sure it's not clogged. Your car needs air to breathe, a constant unrestricted supply of fuel, and spark to run.



While probably not the case, you might have a sticking IAC (idle air control) valve. Often, but not always, those can be cleaned if you can remove the valve part from the motor part. Getting cleaner down in the motor is a no-no.



Hope this helps!

Robert
I have a 99 cavalier and it wont stay running.. we changed fuel filter and o2 sensor and checked fuel pump?
clean IAC and check fuel pressure



these are the most usual causes for hard starting,/bad idling and/or dying