Pressure regulator and fuel manifold (page 2 of 2)

The injectors are fitted to the inlet ducts immediately before the inlet valve.

The injector nozzle is positioned so that the fuel jet strikes the intake valve directly.

The injectors are held in place by the fuel manifold, which presses the injectors into their seats in the inlet ducts. They are also anchored to the fuel manifold by safety clips. Two rubber rings seal the inlet duct and fuel manifold.

The four injectors supplied by GM are supplied at 12V. They are single-spray type with spray cone amplitude of 8°. For the operation check, internal coil resistance is 12 ± 0.4Ω. The figure shows an exploded view of an injector where:

1. Electrical connector
2. Top spring
3. Mobile piston
4. Lower spring
5. Mobile piston seat
6. Adjustable hole
7. Spray orifice

NOTE The injector cannot be overhauled and should be replaced in the case of noise, short-circuits or broken circuits.