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The above picture shows the optimum spray pattern for the Injector unit.
The spray pattern should be a conical
spray of fuel against the walls of the TBU unit bore, not on the throttle
plate itself (as shown in the right). Altough the one on the right
shows a defective injector, it may only need cleaing.
Notice the arrow on both sides of the spray nozzel? The fuel that does not pass through the injector is returned to the fuel tank.