Injectors (weber iwp 001)

INJECTORS (WEBER IWP 001)

The twin jet injectors are used specifically on engines with four valves per cylinder because they allow the jets to be directed against the two intake valves.

The fuel jet leaves the injector nozzle with a pressure differential of 3 bars and nebulises immediately to form two cones.

Injector control is «sequential, staged», i.e all four injectors are controlled in accordance with the cylinder intake sequence. The supply to each cylinder may begin during the expansion stage up to a time when intake has already begun.

The fuel manifold presses against the injectors to fasten them into the seats on the intake ducts. They are also anchored to the fuel manifold by means of «safety clips». Two rubber rings (10) and (11) ensure a seal to the intake duct and fuel manifold.

The injectors are top-feed type and supplied with fuel from the rear of the case, which houses coil (5) connected to electrical connector (9).

Wiring connector

NOTE The numbers in boxes indicate ECU pin no. in order of cylinder number.

Checking resistance

Injector resistance may be measured by disconnecting the connector and connecting an ohmmeter as shown in the figure.

Resistance value 16.2 ohm