VT commo v6 fires once and dies… diagnosis?

This has happened once before and after I had it towed, w the mechanic not ‘finding’ anything I cleaned out the throttle body and connected a hose causing a vac leak

I posted here and confirmed it was likely throttle body

Its just started happening again, from taking a few goes and a bit of gas to start, and now it’s parked up at work bc it refuses to

What could it be? Cleaned throttle body again but no luck

Fuel pump? MAF?

Cheers in advance