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    Posted by EAMONN GREENE on September 2, 2004, 10:50 am, in reply to "Re: isuzu trooper 1999 3.0 4jx1"

    Hi,
    make sure you have the correct oil in the engine. If not there may be air pockets in the oil and thus corrupting the oil in the injectors.
    Near the air intake tube there is a 10-pin connector. This connector has a lug on it that pushes into a bracket. With this lug facing you observe the 5 wires nearest to you. The centre wire (c) carries the voltage signal from the oil pressure switch. With the ignition on and the engine not turning over you should find 0-0.3 volts. Now observe the voltage while cranking the engine. Anywhere between 1.0-1.5 will suffice. I f this voltage is not correct get back to me and I will give you more information on the oil system.
    Next check the fuel pressure. 4-4.5 bar will suffice.
    Next check the crank sensor. This is a Hall unit. There should be a nice square wave on the scope screen. The signal wire for the crank sensor goes to one of the large connectors on the ECU, I can't remember which one. I n the top left hand cornor (of one of the large connectors) there is a yellow wire and it is this wire that is the signal wire from the crank sensor. If still in trouble get back to me.
    Regards
    Eamonn

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