Chrysler laser 1990 Technical Information Manual page 122

INJECTOR
FUEL SYSTEM -
Fuel
Intake port
An injector is mounted on each of the four intake ports of the
cylinder head.
The injector is activated by electric current controlled by the
engine control unit.
needle valve, which form a single unit are magnetically
attracted, causing the injector nozzle to open and fuel to be
injected.
When the current is interrupted, the plunger and needle valve
are pushed back by the spring, closing the injector nozzle.
Spring
and Fuel Pressure Control