Fuel Pressure (Sephia & Spectra)
- Release fuel pressure. See FUEL PRESSURE RELEASE . Disconnect battery negative cable. Install Fuel Pressure Gauge (0K2A1 131 001) on service port at center of fuel rail. See Figure.
- Connect battery negative cable. Jumper DLC terminals FUEL PUMP and B+. DLC is located on left side of engine compartment. See Figure.
- Turn ignition on for 10 seconds or less. Check fuel pressure. See FUEL PRESSURE SPECIFICATIONS table. Turn ignition off and remove jumper wire.
- If fuel pressure is too high, check for restricted return line. If return line is open, replace pressure regulator.
- If fuel pressure is too low, block return line. Run fuel pump again and see if pressure rises. If pressure rises, replace pressure regulator. If pressure does not rise, check fuel pump maximum pressure. See MAXIMUM FUEL PRESSURE (RIO, SEPHIA & SPECTRA) .
FUEL PRESSURE SPECIFICATIONS
| Application |
psi (kPa) |
| Optima & Magentis (Canadian) |
| Maximum Pressure |
|
| Regulator Vacuum Connected |
37 (255) |
| Regulator Vacuum Disconnected |
46-49 (320-340) |
| Holding Pressure |
|
| Rio, Sephia & Spectra |
| Maximum Pressure |
65-94 (450-650) |
| Fuel Line Pressure |
46-51 (320-350) |
| Holding Pressure |
More Than 26 (180) |
| Sportage |
| Maximum Pressure |
More Than 50 (340) |
| Fuel Line Pressure |
42 (292) |
| Regulated Pressure |
| Regulator Vacuum Connected |
34 (235) |
| Regulator Vacuum Disconnected |
42 (292) |
| Holding Pressure |
More Than 21 (145) |