How to keep car running. Starts then dies after only a few seconds.

If you feather the gas pedal will it stay running? If so I would check for dirty/faulty idle air control valve or dirty throttle plate.

I have tried feathering the gas pedal, still turns off. I did notice that when I unplugged the camshaft sensor it still does the same thing. I thought the engine was not suppose to turn over at all. Checked to see if it was magnetic. It was not. Still starts, then shuts off after 2 seconds. Any other suggestions?

Check the fuel- tank filter -if it has been run on low-fuel, tank residue may be clogging fuel filter causing it to sputter out. Pain in the neck process but inexpensive fix. Drop and flush the tank, replace the filter?

It's the anti theft device mine does same thing if I lock and unlock my door with the key that resets it and it will start

I just installed a new radio into my 2002 Mitsubishi Eclipse then a 45 min after radio went off so I disconnected the battery then wait 2m hook it back together so afterwards I went to crank the car up it crunk up but within a few seconds it cut right back off