Avalon barely starts, stalls – Toyota Avalon 1MZ-FE 3.0L 2003

I have a 2003 Toyota Avalon that barely starts up, and runs rough. After a few seconds it stalls out. We (me & a friend) thought it was the timing and we re-timed it, but the problem still stands. According to him though it sounded a lot better after we re-timed it, (I hadn’t heard it crank before we re-timed it) so I would assume that was one of the issues, but we can’t find what is potentially another issue keeping the car from starting and staying running. Other than the timing we have checked:
– Air intake

– Fuel pump

– That it has fresh fuel

– Ignition coils

– The battery is good and charged

All these things check out good.

We also scanned the computer with OBDII and no codes were returned.

Here is a video of it cranking over. On the second attempt at starting it, I revved it a bit and that kept it running a little longer than the first time, but it inevitably stalled out. We also tried starter fluid and IIRC that kept it running, it didn’t stall out until we stopped the supply of it. If it’s still the timing that’s off, just better than it was before, then I really don’t know what to do because the marks are all lined up. If anybody has any idea of what it could be preventing this car from running, any help would be appreciated.

Brand: Toyota
Model: Avalon
Year: 2003
Engine: 1MZ-FE 3.0L