'99 chevy caviler fires right up, but then dies after started, like out of gas. Fuel relay sensor? fuel filter? fuel pump?

Check the ground connections on the ECU computer.

How do you know the fuel pump is good ? Did you do a fuel pump pressure test with a test gauge ? Did you test the fuel pump electric circuit ? Is the check engine light on ? There is a fuel pump relay under the hood engine compartment . The right front behind the headlamp are four relays , the one to the left is the fuel pump relay .I'll send a link to a video on testing the circuit !There also is a fuse in the wiring near those relays , it's power for the fuel pump relay ! Or you have a bad fuel pressure regulator ! A plugged catalytic converter could do this , need to pull the O2 sensor an do a back pressure Test ! Fuel Pressure Test Exhaust Backpressure Testing How To Diagnose Exhaust Restrictions EricTheCarGuy

Could be low fuel pressure. A faulty sensor should turn the check engine light on.

First you must determine if the fuel is stopping or the spark is stopping..If the fuel is stopping this could be a computer problem.. If the spark is stopping then it could be the IGN Module in the distributer. or any nomber of sensors. Squirt a little fuel directly into the Throttle body on the intake manifold.. If the truck runs longer its probably loss of fuel.. Do this several times to make sure, be careful and only use a small amounty of fuel.. you do not want a fire.. RE: Spark: Take a plug wire and an old plug..put the wire on the plug.. hold the plug against a good ground .. have someone crank the engine .. does the plug stop firing? The engine dies.. and will not restart for a minuet or so.. during this "no start" time do the plug test. If the plug will not fire during this time take the module out and take it to Orillys Auto parts.. They can test it.. really expensive part. Don't replace until you know it is BAD..

hello good day, reverse your air filter, make the bottom to top,, if is not work change the high tension wires

it sounds like your alternator is going out

Do an exhaust pressure test on the tail pipe sounds like the cat or muffler maybe plugging up. If it is then the engine won't allow engine to pull fuel into the cylinders and fire.

open up the hood take off the hose going to the throttle body and after cranking see if you can smell gas also check to see if the fuel filter is plugged

Try changing the fuel filter, water trapped in it can freeze. Its a 92 and probably time for a fuel pump. They don't like water either.(Meythonol Fuel) Always change fuel filter when adding antifreeze to fuel

you dont have the right fuel pressure it sounds like the pump is bad