Component Tests and General Diagnostics

Fig. 3 Installing test relay 5170:

Fig. 4 Fuel pressure gauge connections.:

Fig. 5 Fuel pressure gauge connections.:

Be sure engine is cold.
1. Connect fuel pressure gauge. Connect one hose of fuel pressure gauge 5011 to the fuel distributor. Connect the other gauge hose to the fuel line previously removed from the fuel distributor. Disconnect the fuel distributor-to-control pressure regulator line from the control pressure regulator and using special tools 5116 and 5032, connect fuel pressure gauge 5011 between the line and the control pressure regulator, Figs. 4 and 5.
2. Disconnect electrical connectors from the auxiliary air valve and the control pressure regulator.
3. Operate the fuel pump. Disconnect white wire from coil terminal. Switch on ignition. Install test relay 5170 to activate fuel pump, Fig. 3. It is important that fuel pressure tests be performed only in the above manner. Movement of the air sensor plate will cause fuel to be injected, flooding the cylinders.