2002 Sunfire with 2.2 ECOTEC Car acted like it ran out of gas. Would crank, run roughly a few seconds, then again acted like it ran out of gas. The next day and the next 3 days it has performed normally. I now have a trust problem when driving it.

Have the fuel pressure and volume tested with a gage.this sounds and acts like a fuel pump problem.check the fuel filter as well and replace anyways.when it won`t start but cranks can you hear the fuel pump running.listen at the fuel filler neck with the gas cap off.if you can`t listen under the car at the fuel tank you should hear it running/if not hit the gas tank and if the car starts then the pump needs replacing.you should check to make sure you are getting spark at the spark plugs to eliminate an ignition problem but i think its fuel.