Warm Engine Control Pressure Test
- Connect plug to control pressure regulator. Leave auxiliary air valve and air flow sensor (if equipped) plugs disconnected. Place valve for pressure gauge in open position and operate fuel pump.
- After about 5 minutes, pressure should rise to indicated level. See Fuel Injection Pressure Testing table. On models with vacuum hose connected to control pressure regulator, leave hose connected to read pressure.
- Start engine and allow to idle. Pressure should remain the same or rise slightly. On models with control pressure regulator vacuum line, remove and plug hose. Pressure should drop.
- If pressure does not reach level specified, disconnect plug at control pressure regulator. Check for voltage across terminals with test lamp or voltmeter. At least 11.5 volts should be present. If not, check wiring. If voltage is present and pressure not correct, replace control pressure regulator.
FUEL INJECTION PRESSURE TESTING
| Application | Specifications: psi (kg/cm2 ) |
|---|---|
| Line Pressure | 68-78 (4.7-5.34 |
| Warm Control Pressure | 49-55 (3.4-3.9) |
| Rest Pressure | 36 (2.4) |
| Nozzle Opening Pressure | 51-59 (3.6-4.1) |