Cat 3126 fuel pressure sensor location. To test the sensor, simply unplug it; if the engine starts, the sensor is defective. It has three wires and is located on top of the engine near the front, screwed into the head. At low idle, fuel pressure at the filter inlet (8) should read from 400 to 435 kPa (581 to 63 psi). See full list on thecampingadvisor. Specific engines may appear different from the illustration due to differences in applications. When the fuel pressure is sufficient to open check (21), high pressure fuel will be forced through orifices at the bottom of the nozzle into the combustion chamber. A failure of any of the sensors may be caused by one of the following malfunctions: Sensor output is open. Sensor output is shorted to "- battery" or "+ battery". The sensor has a three-wire connector that connects to the engine wiring harness. . com The IAP sensor is located on the back of the high-pressure oil pump (HEUI pump), which is driven by the engine’s gear train. Illustration 1 shows the typical locations of the sensors for this engine. Jul 25, 2017 · Fuel pressure at the inlet to the secondary fuel filter (8) should read between 400 and 525 kPa (58 to 76 psi) during normal operating conditions under load. Oct 8, 2023 · During normal under load operating conditions, the fuel pressure is maintained in the range of 400 kPa (58 psi) to 525 kPa (76 psi) by an orificed pressure regulating valve. aghkbw effmjw blghe nswlvi uhf pgm ttkn agcjwyyy icil antiteco