RT engine fuel injection system with catalytic converter
- 1 - ignition distributor;
- 2 - coolant temperature sensor;
- 3 - air throttle body;
- 4 - pressure regulator;
- 5 - potentiometer G7;
- 6 - fuel distributor;
- 7 - connecting block of the lambda probe;
- 8 - diagnostic connector;
- 9 - connecting block;
- 10 - control unit KE-Jetronic;
- 11 - altitude sensor;
- 12 - idle speed stabilizer valve;
- 13 - ignition coil;
- 14 - ignition switch
Location of the KEIII-Jetronic system installed on NF engines of cars manufactured since 1989
- 1 - ignition distributor;
- 2 - coolant temperature sensor;
- 3 - inlet pipe;
- 4 - idle speed stabilizer valve;
- 5 - carbon filter valve;
- 6 - pressure regulator;
- 7 - fuel distributor;
- 8 - potentiometer;
- 9 - connecting block;
- 10 - control unit KEIII-Jetronic;
- 11 - fuel filter;
- 12 - air throttle body;
- 13 - starting nozzle;
- 14 - ignition coil;
- 15 - knock sensor;
- 16 - connecting block of the lambda probe;
- 17 - connecting block for heating the lambda probe;
- 18 - connecting block of the knock sensor;
- 19 - ignition switch;
- 20 - altitude sensor
Fuel cut-off circuit
- 1 - engine braking valve;
- 2 - air filter;
- 3 - air intake pipe;
- 4 - air flow meter;
- 5 - meter plate;
- 6 - air duct;
- 7 - throttle valve;
- 8 - fuel distributor;
- 9 - branch pipe for connecting a vacuum tube;
- 10 - bypass hose
The height of the plate lift depends on the amount of air supplied to the engine cylinders: the greater the air flow, the higher the plate rises. In this case, the plate lever presses the fuel distributor plunger, which leads to an increase in the amount of fuel supplied to the cylinders. When the airflow is reduced, the plate is lowered, the plate arm in turn lowers the plunger and the fuel supply is reduced. When the engine speed is not more than 1400 min-1, the coolant temperature is not higher than 30°C and the throttle is in the idle position, the valve is turned on and air flows through the bypass hose, bypassing the air flow meter. The plate is lowered, releasing the plunger, and the fuel supply is turned off until the valve closes. For better mixing, the plate should be located exactly in the center of the diffuser.
Order of execution
1. Loosen the clamps and remove the air duct (see fig. The main elements of the fuel injection system).
2. If the plate (1) displaced, loosen the screw (2). Center the insert using a 0.1 mm feeler gauge by inserting it around the insert. Tighten screw.
3. Raise and quickly lower the plate. When moving down, there should be no resistance. If resistance is felt, then the air flow meter is faulty and needs to be replaced.
4. If resistance is felt when the plate moves up, you need to remove the fuel distributor, remove and rinse the plunger in gasoline. If this does not help, replace the fuel distributor.
5. Check the height of the plate in relation to the diffuser. Gap between the upper edge of the plate and the edge of the cylindrical part of the diffuser (arrowed) must be: for engines with K-Jetronic 0-0.5 mm, for engines of KZ models 1.75-2.05 mm, for engines with high pressure K-Jetronic and KE-Jetronic (in these engines, fuel is supplied to the nozzles through metal tubes) 1.9–3.0 mm. To adjust the position of the plate in height for engines with the K-Jetronic and KZ system, remove the air duct (see fig. The main elements of the fuel injection system), lift the plate and bend or squeeze the wire bracket located under it, as shown in the figure on the left. For other engines, remove the filter cover with the filter element and adjust the position of the plate by turning the nut on the stop screw of the plate, as shown in the figure on the right.
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