v6x6v6

Hello from Slovenia, nice to see Xedos community so alive!!

I need help on my X6, as it has started to have problems on ignition. Here is the situation:

Xedos6, 2.0 V6 - 1993 220.000km

in past 2000km changed items with new:
- timing belt with hidraulic spanner
- belt for servo and water pump
- fuel filter
- fuel pump
- battery
- ignition cables (NGK) all 6 + 1 main
- spark plugs changed 8.000km

Facts:
- car will always start, never it happened that it would not
- problem is that it needs 4-5 seconds to ignite, so its igniting too long for sure, but ignites.
- after ignition there is no problem whats-o-ever, performance is 100%, fuel / oil consumption normal, really no problem, only bloody ignition

Tests made:
-fuel pump works - i bridged F/P - GND on diagnostic, and fuel pump started before ignition, but still takes time to ignite
- I bridged TEN/GND, and puted a 5W bulb on FEN/B+ - put power on, no error codes (flashes) unless really LED is needed? But I assume 5W bulb is also ok
- the only time I can make car start normal is with the trick: start the car for 1 sec. then release the key with leaving it on ACC, then after 3-4 second start again and car starts in 1-2 sec.
PRoblems accure if hot or cold (overnight stand)

So I am suspecting fuel pressure regulator - could this do the trick???

Please advise, thanks!!