Fuel Pressure: Specifications

Fig. 1 Thermo time switch triggering time:

Control pressure, cold (immediately after starting) ..... see "WARM UP REGULATOR" in DIAGNOSIS AND TESTING
Control pressure, warm ..... 3.4 - 3.8 bar (49 - 55 psi)
Control pressure (regulator with one vacuum hose), warm (vacuum hose OFF) ..... 2.7 - 3.1 bar (39 - 45 psi)
Control pressure (regulator with two vacuum hoses), warm (vacuum hoses OFF, and 0.5 bar (38 cm Hg) vacuum applied to small connection) ..... 1.4 - 1.8 bar (20 - 26 psi)
System pressure ..... 4.7 - 5.4 bar (68 - 78 psi)
Leak test (min. residual pressure):
after 10 min..... 2.6 bar (38 psi)
after 20 min ..... 2.4 bar (35 psi)
Thermo-time switch activation period ..... See Chart Fig. 1.
Cold start valve:
min voltage ..... 11.5vdc
injection time ..... see thermo-time switch chart
Auxiliary air reg min voltage ..... 11.5vdc
Control pressure regulator:
min voltage ..... 11.5vdc
heater resistance ..... 16 - 22 ohms
Fuel injectors:
opening pressure ..... 3.5 - 4.1 bar (51 - 59 psi)
difference between injectors ..... 0.6 bar (8.5 psi)
Air preheat thermostat
open below ..... 20°C (68°F)
closed below ..... 34°C (93°F)