Opel Vectra A

since 1988-1995 of release

Repair and car operation



Vektr A. Opel
+ 1. Maintenance instruction
+ 1.1 Maintenance
+ 2. Engine
+ 3. Repair of DOHC engines
+ 4. Repair of the diesel engine
+ 5. Cooling system
+ 6. Fuel system
- 7. A fuel and exhaust system of models with system of injection of fuel
   7.2. General information
   7.3. Check of system of injection of fuel
   7.4. Air filter
   7.5. Air chamber
   7.6. The control unit in temperature of air arriving in the engine
   7.7. The sensor of temperature of air arriving in the engine
   7.8. Pressure removal in fuel system
   7.9. The fuel filter on models with the fuel pump out of a fuel tank
   7.10. The fuel filter on models with the pump in a fuel tank
   7.11. Check of the fuel pump
   7.12. The fuel pump established out of a fuel tank
   7.13. The fuel pump established in a fuel tank
   7.14. Replacement of the relay of the fuel pump
   7.15. Pipe of a toplivozalivny mouth
   7.16. Fuel tank
   7.17. Fuel level sensor
   7.18. Quencher of fluctuations of fuel
   7.19. Accelerator cable
   7.20. Check and adjustment of a fuel mix on idling turns
   7.21. Regulator of pressure of fuel
   7.22. Regulator of turns of idling
   7.23. Sensor of provision of a butterfly valve
   7.24. Potentiometer of provision of a butterfly valve
   7.25. Measuring instrument of a stream of air
   7.26. Measuring instrument of weight of a stream of air
   7.27. Tape measuring instrument of weight of a stream of air
   + 7.28. Fuel nozzles (except Multec)
   7.29. Fuel nozzle (Multec system)
   7.30. Check of a fuel nozzle (Multec system)
   + 7.31. The throttle case (except Multec system)
   7.32. Throttle case (Multec system)
   7.33. Step-by-step engine of management of supply of air (idling turns)
   7.34. Potentiometer of provision of a butterfly valve
   7.35. Electronic control device (ECU)
   7.36. Sensor of a detonation and module (X16 SZ models)
   7.37. Sensor detonations (Simtec system)
   7.38. An inlet collector (the SOHC engine without Multec)
   7.39. An inlet collector (the SOHC engine with Multec)
   7.40. Inlet collector (DOHC models)
+ 8. Exhaust system and system of fall of toxicity of exhaust gases
+ 9. Fuel systems of the diesel engine
+ 10. Engine electrosystems
+ 11. Transmission
+ 12. Mechanical transmission
+ 13. Automatic transmission
+ 14. Power shafts
+ 15. Brake system
+ 16. Suspension bracket
+ 17. Body
+ 18. Electric equipment
+ 19. Check of malfunctions



7. A fuel and exhaust system of models with system of injection of fuel

7.1. Technical characteristics

General information

Type of system of injection of fuel:
C16 NZ, C16 NZ2, X16 SZ and C18 NZ
Central system of injection of Multec fuel
20 NE, C20 NE and 20 SEN (till 1990)
Motronic M4.1
20 NE, C20 NE and 20 SEN (since 1990)
Motronic M1.5
20 XEJ and C20 XE (till 1993)
Motronic M2.5
C20 XE (since 1993)
Motronic M2.8
X20 XEV
Simtec 56.1
Capacity of a fuel tank
61 l
Octane number applied топлива*:
Etilirovanny gasoline
98 RON
Unleaded gasoline
95 RON

* Models with the catalyst (engines with the first letter C or X) should be maintained only on unleaded fuel.

Idling parameters

Idling turns:
– C16 NZ and X16 SZ
850 ± 80 rpm
– C16 NZ2
880 ± 80 rpm
– C18 NZ
   • models with a mechanical transmission
880 ± 80 rpm
   • models with an automatic transmission
830 ± 80 rpm
– 20 NE, C20 NE and 20 SEN
800 ± 80 rpm
– 20 XEJ and C20 XE
940 ± 80 rpm
– X20 XEV
850 ± 160 rpm
Idling turns on these models are not regulated, and are provided only for information.
The contents WITH in exhaust gases:
– 20 NE and 20 SEN
At most 1,0 %
– X20 XEV
0,7-1,2 %
Other models
0,3 % (at 2800-3200 rpm)

Pressure of fuel at the connected vacuum hose

Multec
0,76 bar
Motronic M4.1:
– a submitting hose
2,3-2,7 bar
– returnable hose
0,3-1,5 bar
Motronic M1.5
– a submitting hose
1,8-2,2 bar
– returnable hose
0,3-1,5 bar
Motronic M2.5
2,0-2,2 bar
Motronic M2.8
2,2-2,7 bar
Simtec 56.1
There are no data

Tightening moments

The tightening moments on models with systems of injection of fuel same, as well as on models with carburetors except for the mentioned below.

The fuel highway to an inlet collector
8 Nanometers
Quencher of a stream of fuel
20 Nanometers
Holder of a fuel nozzle
3 Nanometers
Regulator of pressure of fuel
2,5 Nanometers
Clip of the fuel pump
4 Nanometers
The step-by-step engine operating supply of air in the engine on turns of idling
2,5 Nanometers
The detonation sensor to the block of cylinders (X16 SZ)
13 Nanometers
Oxygen sensor
30 Nanometers
Throttle case
20 Nanometers
Fastening of the top part of the case of a throttle to the bottom
6 Nanometers
Potentiometer of provision of a butterfly valve
2 Nanometers
Casing of an air zaslonka to an inlet collector
9 Nanometers