also found this at the manual: https://zinref.ru/avtomobili/Chrysle...nglish/680.htm
it says that:
7. Pressure should not fall below 2.5 bar (36 psi) after 30 minutes.
8. If pressure falls below 2.5 bar (36 psi) within 30 minutes, it must be determined if a fuel injector, the check valve
within the fuel pump, or a fuel tube/line is leaking