1UZ in Thai longtail boat

Discussion in 'General Discussion' started by melvinmelvin, Jul 8, 2017.

  1. melvinmelvin

    melvinmelvin Member

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    HOW LONG WAS ADAM IN EDEN (few hours)
    Following on since it started brilliantly without coolant.
    Yesterday:
    Connected up the electrical fans on the oil cooler and the thermo switch on the radiator.
    Tanked up with coolant - 11-12 liters.
    I have a significant voltage drop somewhere in the ignition circuit so must use a jumper cable from battery to close to the ECU loom in order to start.
    Started immediately with flying honors. Running SMOOTH AS SILK , as we say, on all 8.
    Adjusted idle to 450/500. Checking gauges working.
    Stop / start a few times, checking a bit. All 5 oil cooler fans working as they should.
    Starting and let it run, want it up to 80+ degrees in order to check that thermo switch and radiator fan relays are working.

    After 15 + minutes or so, white smoke spotted from the exhaust pipe serving cylinders 2 and 4. (The exhaust is normally totally invisible.)
    What now? Checking by hand the pressure of the exhaust coming out of the pipes, sure - cylinder 2 or 4 not working.
    Checking spark plug 2 and 4, they fire OK.
    Off with air intake conduit - checking injectors and ther plugs - sure enough - black wire broken in one of the injector plugs.
    OK, searching scrapyards for plugs today.

    Conclude to run on 7 until warm so that I at least can tick off the thermo switch and the relays as being OK.
    Start? Nee way. Stone dead. Not one cylinder firing. Checking wiring around coils and igniters - seem OK. Still stone dead.
    Have a spare ECU that I can put in and test next time I decide to have a go.

    Getting a bit bored with problems now.
    Seems Murphy is following med closesly most of the time and sometimes (too often) he catches up.
     

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