Diky za odpověd, nekde proste zacit musím... auta delam bezne ale niva je neco nového..
A už jsem našel-
http://www.iw1axr.eu/Manuali_off/Lada%20Niva%20Service%20Manual(ENG).pdf-A lower pressure (below 190 kPa) can be caused by a faulty
fuel pressure regulator or by a restricted flow in the fuel delivery
system.
The fuel delivery system capacity can be checked by return
flow. When necessary, renew the gauze filter.
The fuel pressure regulator can be checked by a pressure
gauge; for that disconnect the return hose and immerse it into a
container. Operate the electric fuel pump, pinch the return hose
and check the pump pressure by the pressure gauge. Release the
hose. The pressure gauge reading is the pressure of the fuel pres-
sure regulator valve actuation. Renew the fuel pressure regulator
when applicable.
A higher pressure in the fuel supply system (in excess of 210
kPa) can be caused by a faulty fuel pressure regulator or a high -
er resistance to fuel return to the fuel tank
Doufam ze se to tyka MPI.