Intake Manifold Lower Section, Disassembling and Assembling

Fuel Injection and Ignition, General Information

NOTES:
- The Engine Control Module (ECM) has On Board Diagnostic (OBD) capability Before carrying out troubleshooting and repairs, DTC memory must be checked. Vacuum hoses and connections must also be checked (unmetered air).
- Fuel lines in the engine compartment must only be secured using spring type clips. The use of clamp or screw type clips is not permissible.
- Components marked with a * are checked via the On Board Diagnostic (OBD). Testing and Inspection
- Components marked with a * *can be checked with output Diagnostic Test Mode (DTM). Testing and Inspection
- For trouble-free operation of the electrical components, a voltage of at least 11.5 V is necessary.
- Do not use sealants containing silicone. Particles of silicone drawn into the engine will not be burned in the engine and will damage the oxygen sensor.
- When performing some repairs, it is possible that the control module will recognize a malfunction and store a DTC. After completing all checks and repairs DTC memory must be checked and, if necessary erased and the readiness code must be generated. Testing and Inspection
- Safety precautions. Technician Safety Information
- Rules for cleanliness. [1][2]Technician Safety Information
- Technical data. Specifications





1 - Fuel pressure regulator
- Checking fuel pressure regulator and holding pressure. Testing and Inspection
2 - O-rings
- Replace if damaged
3 - Vacuum hose
- To intake manifold upper section
4 - Air line
5 - Air hose
- For air shrouded fuel injectors
6 - O-ring
- Always replace
- Before installing moisten with clean engine oil
7 - Cyl. 1, 2, 3 & 4 fuel injectors (-N30- through -N33-)*/**
- Checking. Testing and Inspection
- Air shrouded
8 - 20 Nm (15 ft lb)
9 - Intake manifold, lower section
10 - Gasket
- Always replace
11 - Fuel rail
12 - 10 Nm (7 ft lb)
13 - Retaining clip
- Make sure clip is seated securely
14 - Cable guide
- Clipped onto fuel rail
15 - Return flow connection
16 - Supply connection
17 - To intake hose