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Thread: TD5 loss of power

  1. 26th November 2009, 07:57 PM #1
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    rdavies
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    TD5 loss of power

    Hi guys, I have read a bunch of threads this evening about TD5 loss of power and have come to the conclusion my MAF sensor may have stopped working and the vehicle has gone into go slow mode.

    Vehicle - Nov 2000 D2 TD5 approx 235,000 Km

    Symptom - driving today up a slight incline all of sudden loss of power, I heard some kind of click or slight knock sound, nothing loud, wasn’t sure if it came from transmission or engine bay, heart started racing and of course think the worst. Pulled over straight away, checked under hood everything looked and sounded ok while idle and when driving home sounded fine, no warning lights came on in the dash. Continued home very sluggish, like no turbo working, I had to back down the gears to get up some of the hills, but got home no worries. Auto gear changes were working fine.

    Straight into the garage and noticed oil dripping onto driveway, checked and banjo bolt on oil feeder to turbo was leaking quite bad, must have just happened as have had no leaks there previously. Is it coincidence ! Anyway, pulled out bolt and checked, cleaned and tightened, no more leak. Still no power though !! Checked all the intercooler hoses, they look a bit tired and could probably do with replacement (silicon I believe is best), noticed some oil residue in the in and out hoses, nothing unusual from what I have read. Checked air filter and air filter box for blockage or debris, all ok, cleaned sensor electric connectors with CRC and dried off with air compressor – all shiny now.

    I just get real scared cause this baby is starting to cost a bit and the wife gives me a hard time - easy for her she drives a new car….I am sure the guys at Les Richmond love me, every time I call it costs me $500 !!

    Anyway, does my conclusion sound reasonable, MAF sensor?? I assume test book would confirm. So, assuming this is the problem is it still safe to drive to mechanic, approx 25 Km away or is a tow a better option (you gotta love RACV).

    Thanks guys.

    Cheers
    Richard
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  2. 26th November 2009, 09:00 PM #2
    Graeme
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    Disconnecting the MAF sensor wouldn't normally make a major difference, so its something you can easily try.
    I'd be hoping for a delaminating i/c hose, esp the one attached to the i/c inlet pipe. You may need to remove it for proper inspection, but if it feels very soft and is easily squashed or pinched then it could causing be the problem.
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  3. 27th November 2009, 06:06 AM #3
    DONNYDISCO Guest

    Loss of power

    Hi, britty here,
    just a thought, if the EGR pipe, from the manifold to the EGR valve develops a leak, the turbo does not get the full exhaust pressure, result, flat as a f*rt.
    This happened on my D2 TD5.
    Good luck.

    paul s.
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  4. 27th November 2009, 09:25 AM #4
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    rdavies
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    Thanks guys, some great things to look at.

    The i/c inlet hose is very soft, I can easily squeeze it, so pulled off and inspected, no sign of damage. I also notice there is now a humming noise I havent heard before, sounds like it is coming from the back of the turbo when the revs are higher than idle, maybe the turbine wheel that catches the exhaust gas. Could this be a leaking exhaust? I cant see of feel any gases escaping anywhere. The other thing is I did have a signficant oil leak from the banjo bolt oil feeder on top of the turbo, maybe this is related and maybe the shaft between compressor blades and turbine wheel has been damaged through lack of oil...just a thought and mmmm that sounds expensive.

    Is it possible the oil outlet from bottom of turbo could get blocked preventing oil from passing through hence the reason for the initial oil leak due to pressure build up?

    Anyway it is getting beyond my capability so off to mechanic.

    Cheers
    Richard
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  5. 27th November 2009, 12:45 PM #5
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    And after some further investigation found 2 bolts from exhaust manifold are missing (top and bottom) the ones closest to firewall - some gas must be leaking as I can see some black sorty deposit.
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