Relieve fuel pressure in the fuel system

Turn off the ignition and remove the "negative" terminal of the battery

Disconnect the auxiliary air regulator connector.

Remove the air supply hose and disconnect the throttle cable from the throttle body.

Replacing the nozzle of the ZMZ 406 engine

Use a screwdriver to loosen the clamp of the lower (outlet) hose of the idle speed regulator.

ZMZ 406 engine nozzle replacement

Using a screwdriver, loosening the clamp, remove the hose of the crankcase ventilation system.

Replacing the nozzle of the ZMZ 406 engine

Loosen the clamp, remove the vacuum brake booster hose.

Replacing the nozzle of the ZMZ 406 engine

Using a screwdriver, loosening the clamp, remove the fuel pressure regulator hose

Replacing the nozzle of the ZMZ 406 engine

Using the “13” key, unscrew the nut that secures the tip of the “ground” wire to the first intake manifold stud

ZMZ 406 engine nozzle replacement

Similarly, disconnect the wire from the last intake manifold stud.

Then, having unscrewed the remaining nuts of the intake manifold studs with the “13” wrench, remove the receiver.

Replacing the nozzle of the ZMZ 406 engine

Loosening the clamp, remove the supply hose from the fuel rail fitting.

ZMZ 406 engine nozzle replacement

Loosen the clamp, remove the crankcase ventilation hose from the idle system pipe.

ZMZ 406 engine nozzle replacement

Loosen the clamp and remove the drain hose from the fuel pressure regulator fitting.

ZMZ 406 engine nozzle replacement

Using the “10” key, unscrew the two bolts securing the fuel rail to the intake manifold and remove the rail

Replacing the nozzle of the ZMZ 406 engine

Prying off the spring latch of the block with an awl, disconnect the connector from the nozzle.

Remove the nozzle from the manifold.

Install the nozzle in reverse order.