2004 Chevy Malibu

What was the fuel pressure you had? Also, have you checked for spark?

Here is a how to for checking for spark:

https://www.2carpros.com/how_to/how_to_test_an_ignition_system.htm

Here is one for checking fuel pressure:

https://www.2carpros.com/how_to/how_to_check_fuel_pressure.htm

Let me know what you find.

Joe