Repair Simos 2 Injection System; Safety Measures; Rules Of Cleanliness; Technical Data - Skoda OCTAVIA MK1 Service Manual

Repair Simos 2 injection system

Safety measures

WARNING
The fuel system is under pressure! Place a cloth around the connecting points before
releasing the hose connection or when opening the test connection (to fuel pressure
measurement). Then reduce the pressure by carefully removing the hose or cap.
Observe the following points to prevent injury to persons and/or damage to the injection and
ignition system:
t Do not touch or remove ignition leads with the engine running or at start speed.
Disconnect and connect the cables of the fuel injection and ignition system only when the
t
ignition is switched off. This also applies for the cables of the measuring devices.
To operate the engine at start speed without the engine starting (e.g. testing compression
t pressure), pull out the plug from the power output stage of the ignition coils. After
performing the work interrogate fault memory and erase
t Do not carry out engine wash unless the ignition is switched off.
Switch off the ignition before disconnecting and connecting the battery, as this may
t
damage the 4AV control unit.

Rules of cleanliness

Carefully observe the following five rules for cleanliness when working on the fuel supply/injection system:
t Thoroughly clean the connection points and their surroundings before releasing.
t Place removed parts on a clean surface and cover. Do not use fuzzy cloths!
t Carefully cover or close opened components if the repair is not completed immediately.
Only install clean parts: Remove spare parts from their wrapping immediately before installing. Do not
t
use any parts which have been stored unwrapped (e.g. in tool boxes etc.).
t When the system is opened: Avoid using compressed air. Avoid moving the vehicle.

Technical data

Engine identification characters
Idling speed
speed not adjustable, is controlled by the idle
stabilizer
Speed limiter
by disconnecting the injectors
Fuel pressure at idling speed
→ Chapter.
760 - 880 rpm
approx. 6350 rpm
Vacuum hose fitted on
Vacuum hose
183
AEH, AKL
approx. 0,25 MPa (2,5
bar)
approx. 0,3 MPa (3