So I purchased this 2007 Chevy Silverado 1500 Classic 4.3 V6 back in Feb 2019. In late December 2019, I drove to work one morning, no issues at all. Then, when I went to leave for lunch, unable to start. Turns over and over, lots of power, but no start. Since that day, I have:

Changed crankshaft position sensor, checked for fuel at the throttle body (doesn’t start at all even with starter fluid), checked for fire at the spark plug (all good), and changed the whole distributor/rotor. I’ve also hooked it up to a diagnostic tool and it found no codes.

Still sounds the same, and no start. It sometimes sounds like it catches and wants to crank, but then just starts turning over again. If I use starter fluid, it’s turns over a few times, then backfires back out the air intake.

Im hoping some others have encountered this issue before? Any ideas! Any help is very much appreciated!