Diesel Injectors Pump and Glow Plugs

Injectors;
The injectors that we tested are Nissan diesel injectors.
All of the injectors that we tested were all faulty.
One injector had the tip broken off which caused the fuel to spray out to the side and dribbled alot.
The second sprayed in a very straight line, it did not cone out very much.
The third was very in-consistent and sprayed lines all over the place.
The fourth also had very direct squirts in straight lines.

Bleeding injector pump;
Because our engine does not have a bleed screw, what we had to do was remove the fuel return line from the injector pump. We then pumped the lift pump until there was no air in the injector pump, ie, solid flow of diesel out of the pipe. We then put the pipe back on. Our engine then started. If the engine didn't start, we would of had to undo the injector pipes at the injectors and crank engine until a solid flow of diesel comes out,  then tighten the pipes back up. The engine will then start.

Electronic shut off valve;
We had 12.53V of voltage at the solenoid and 8.6ohms of resistance in the windings of the solenoid. When we applied the voltage, we could hear the valve opening.While the engine was running, we disconnected the plug, and the engine stopped, which is proof that the valve is working, as it shuts and stops the flow of diesel when no voltage is applied.

Injector pump timing;
The injector pump that we took off, re-mounted, and timed up was a Mazda injector pump. When we remounted the pump, we had to use the DTI to do the fine timing, because it is a rotary type injector pump as opposed to an in-line type. To do this, we screwed the DTI into the end of the pump. We then turned the engine over to 30 degrees BTDC, zero-ed the DTI, then turned the engine over to 2 degrees ATDC. The manufacturers specs for the plunger travel of the pump is .98 to 1.02mm. Our test resulted in 1.00 mm which is within the specs.

Glow Plugs;
While testing these glow plugs, we found that all four glowed bright orange in colour. However, we did not get the expected current pattern, as the current closest to the earth drew less current than the rest. This glow plug should have drawn the most current because there is less resistance than that of the furthest plug.  This unexpected result could have been due to the loose alligator clip not producing a good connection, more resistance, less current.