02 · Engine

Fuel system

10 EngineFuel system

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FUEL SYSTEM

- Bosch Motronic M 2.7 integrated MPI injection - ignition system	1
- Diagram of Bosch Motronic M 2.7 injection - ignition system	1
- Principle of operation of injection system	2
- Principle of operation of solid state ignition system	2
- Components of Bosch Motronic M 2.7 system	4
- A. Fuel supply circuit	4
- Electric pump	5
- Fuel filter	5
- Pressure regulator and fuel manifold	6
- Injector	7
- Inertia safety switch	8
- Injector ventilation and cooling device	9
- B. Air intake circuit	10
- Hot wire air meter (debiimeter)	11
- Accelerator throttle case (throttle case)	12
- Engine idle speed actuator	12
- Turbocharging pressure regulation solenoid (Pierburg)	13
- Turbocharging regulation solenoid connection diagram	13
- Mechanical by-pass valve	14
- Main precautions to be observed for correct use of turbocharged engines	14
- Intercooler	14
- Turbocharger	15
- Intake air temperature sensor	15
- Absolute pressure sender unit (barometric capsule)	15
- C. Electric/electronic circuit	16
- Electronic control unit (control unit)	17
- ECU/actuator sensor electrical connection diagram	19
- Location of Bosch Motronic M 2.7 injection - ignition system components in engine bay	20
- Diagram of input and output between ECU and system sensors and actuators of Bosch Motronic M 2.7 system	21

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- Bosch M 2.7 system control relays	22
- Throttle valve position sensor	23
- Engine coolant temperature sensor	23
- RPM and TDC sensor	24
- Injection timing sensor	24
- Knock sensor	25
- Solid state ignition system with ignition coil and 4 high tension outputs	25
- ignition power module	26
- Automatic diagnosis of Bosch Motronic M 2.7 system	27
- D. System for controlling harmful exhaust emissions	28
- Fuel evaporation control and vapour recovery circuit	29
- Multifunction valve	32
- Active carbon trap filter	33
- Vapour control solenoid	34
- Pneumatic flushing valve	34
- Engine block gas recycling system	35
- Checking adjustments and repairs to Bosch M 2.7 injection/ignition system additional to diagnoses with Fiat/Lancia tester	35
- Removing - refitting electric fuel pump	36
- Removing - refitting fuel filter	36
- Removing - refitting fuel manifold with injectors and pressure regulator	37
- Check on rpm sensor	38
- Adjusting injection timing sensor	38
- Adjusting accelerator control	39
- Approximate check on idling ignition advance using stroboscopic lamp	40
- Ignition coil Bosch 0.221.503.407	40
- Spark plugs	41
- Checking engine idle speed	42
- Checking levels of polluting emissions	42
- Checking fuel feed circuit pressure	43

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