OK, so here is some info on the car. 2002 4.0 V6 180K.
recent full tune up, new plugs, wires, alternator, thermostat, air filter, fuel filter.
No CEL, fuel pressure 60 psi
The engine starts as it should, after 20 sec it just stalls, and dies. it don't matter if I hold down the gas. no codes at all.
i cannot solve this one?
Sounds like a spark issue/computer issue. If it maintains fuel pressure that's not it then. Try to download the Torque app on your phone and buy a $20 OBDII adapter. You can data log it and see if the spark falls off.