How to test the oil rail pressure sensor of 4jx1

Where is the oil pressure sending unit located? ('86 4LZD1)

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Holden Jackaroo 2001 3.0 TDI 4JX1 Problems - YouTube

? 8:14
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Holden Jackaroo 2001 3.0 TDI 4JX1 Problems .... Hi there, currently own a 3.0 2002 lwb trooper 34K miles ...Missing: ltd

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Missing: ltd

check what ignition key you are using. is it spare key? try another key.

Hi Carl, What engine is fitted in your vehicle? If its the 4JX1 If your engine is fitted with the common rail fuel injection system, I suggest that you have the engine flushed with the correct engine oil, replace the two oil filters and then try starting the engine. If nothing happens then suspect the ORP Sensor, found inside the tappet cover and mounted on the oil rail. This is the sensor which opens the electronic gate of the injector drive. It is a crystal sensor and is operated by the pressure of oil pumped through the lubrication system of the engine. If the oil is not of the correct viscosity and too thick it will crack the crystal causing failure. Regular servicing with the correct oil is ultra important with those engines. Regards John

hi Steve. May be sensor camshaft/crankshaft I have problems not srart engine 4JX1 Isuzu Bighorn I replaced sensor camshaft [email protected] max russia

Sends a signal related to the rail pressure as a voltage to the ECM. 3 wire connector :

• Red : 5V (Feeds from ECM connector J1-4) Shared with MAP sensor, EGR pressure sensor and accellerator position sensor.(compare values from these sensors and ECM connector)
  
• Black : Ground (Feeds from ECM J2-22) Shared with the same sensors mentioned above
• White : Signal feeds to ECM connector J2-22

Low pressure will set P1194 error code. Oil rail pressure should be more than 3MPa when cranking

Also check Engine coolant temp sensor and wiring. Engine coolant to manifold temp should not differ by more than 5 deg C either way after 8 hours of no operation. I have found the same symptom on these diesels with fuel supply problems. Operate the priming pump (on top of the fuel filter) until it becomes diffycult to push down before starting or checking anything else.

You have no injection pump ,each injector does that job .
You have a faulty rail oil pressure sensor I think ,read my tips to test this sensor .

Rail oil pressure sensor is the one to check first ,buy the engine oil dipstick is a electrical connector with all pink wires going into the engine but on the other side will be one white one maybe looks a bit yellow , now pull this one wire out and see if you can start the car ?

If starts good the sensor is faulty but dont drive like this its only a test ,get a new sensor.

Dear sir I have Bighorn 3.0 4JX1 car. Suddenly it start cuting of engine while running, like no fuel, but it start again. But sometimes it doesn´t. and before cutting it make noise us the fuel supply is cuting in the pump. Here we don´t have computer scan. Can someone indicates where to check? which sensor? Thanks

Most likley cause is the Rail Oil Pressure Sensor which is under the cam cover and sends info to the ECU . No or wrong info an the ECU stops the engine ,you can test this part by pulling out the white or yellow wire from the multi plug by the dipsick on the car side of the loom .All the other wires in this plug are pink so its easy to see. then if the car starts the sensor is at fault but get a new one !