Contents: General ↡ Gasoline pump ↡ Fuel injectors ↡ Sensors and actuators ↡ Tightening torques for connections,…↡
General
System type - Bosch CIS-E continuous fuel injection system with electronic control
The working pressure of the fuel in the system is 5.3-5.5 bar
Gasoline pump
Type - Self-priming, 12V electrolyzer
Productivity - 1.5 liters/min (minimal)
Supply pressure - 2-4 bar
Fuel injectors
Type
Opening pressure: up to 08/1988:
- New injectors - 3.5-4.1 bar
- Working nozzles - 3.0 bar (minimum)
[Text republished from the website: mercedesman]
After 09/1988:
- New injectors - 3.7-4.3 bar
- Working nozzles - 3.2 bar (minimum)
Sensors and actuators
Note: All values are approximate and provided for reference only.
Coolant temperature sensor
Type - NTC (negative temperature coefficient)
Electrical resistance:
- At 80°C - 3250 m
- At 40°C - 12000 m
- At 0°C - 60000 m
Thermal switch with time delay
Heater coil resistance - 930 m
Duration (period of time of closed state of contacts):
- At 20°C - 12.0 sec
- At 0°C - 1.5 sec
- At 3°C - 0.5 sec
Air flow sensor potentiometer
Supply voltage - 7-9 V
Changing the voltage of the viper:
- The engine does not work - 0.25-0.5 V
- Full scale deviation - 7.0-9.0 V
Tightening torques for connections, Nm
- Fuel Level Sensor Assembly - 40
- Throttle body mounting screws - 25
- Fuel line fittings - 10
- Fuel tank filter - 40
- Fuel tank bolts - 20
- Oxygen sensor - 55