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Thread: D2 TD5 - MAF sensor disconnected = ZOOM

  1. 28th January 2011, 12:15 PM #1
    Wil2k's Avatar
    Wil2k
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    D2 TD5 - MAF sensor disconnected = ZOOM

    Morning all!

    I've been trying to track down our 2002 D2s sluggishness at lower revs. Gutless is best description. Last week I disconnected the MAF sensor and took it for a run. Holy smoke! It's back! very responsive, lots of power even down low with the 2000 -2500 rpm slug it feels great to drive.

    Bought a can of MAF cleaner and gave the MAF a good go, but barely any noticeable difference (if any). Disconnect the MAF and wayhey we're away again.

    Can anyone tell me:

    1) Will it damage anything running with the MAF disconnected? Or will it just mess up my economy?
    2) Looking at related causes: are intercooler/turbo hose delamination/splits; or wastegate/wg modulator probs; or oil in the loom (I'll check that one today) likely to result in this behaviour?
    3) Is it simply likely to be a stuffed MAF.. if so where in Brisbane is best to get these things? FWD yeronga are close by (ish)

    As always thanks in advance for your wisdom!

    Cheers

    Wil
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  2. 28th January 2011, 02:10 PM #2
    Hamish71 Guest
    The output of the MAF can be checked via a nanocom if you have one. If not, someone with one might be able to help and advise the correct outputs. From memory - 48 to 55 Kg/hr at idle and 550-650 at full throttle, with 620ish being the target figure.

    The simple check of your MAF is to find someone with a good one, and do a swap....carefully though...they are a bit fragile. As for a replacement, run it with your MAF disconnected, and take the time to order one from the UK....Much cheaper.
    Last edited by Hamish71; 28th January 2011 at 02:11 PM. Reason: fixed sp before sp nazi could bag me
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  3. 28th January 2011, 02:23 PM #3
    Wil2k's Avatar
    Wil2k
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    Quote Originally Posted by Hamish71 View Post
    ...run it with your MAF disconnected, and take the time to order one from the UK....Much cheaper.
    Cool. I'll do just that. Was worried that running without the MAF might do bad things to the rubber bands that make the TD5 go.

    Anyone got a Nanocom round my neck of the woods? Brisbane > Coorparoo. I'd be cool to check the flow before I order one from the UK.

    Cheers

    Wil
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  4. 28th January 2011, 03:49 PM #4
    Wil2k's Avatar
    Wil2k
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    Oh ho!!! This looks a good place to start...



    Hehe.

    Wil
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  5. 28th January 2011, 04:41 PM #5
    feraldisco's Avatar
    feraldisco
    feraldisco is offline Master Supporter
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    Karcraft are a good starting option for parts - then you can see if the UK + postage prices are significantly cheaper
    Always looking for creative new ways to get bogged... :whistling:

    76 RR...sold coz fuel was expensive at 70c/l :eek:
    93 200 Tdi Disco...old faithful...sold to make way for...
    99 Td5 Disco ACE...nice drive...hopefully reliable...
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  6. 14th March 2011, 02:38 PM #6
    canblogerra Guest
    It's been ages since this thread moved but thanks Wil2k for this useful info. My TD5 was going in fits and starts especially with the pedal down. Without the MAF it ran smoothly whatever I was doing.

    Ended up being a loose clamp on the turbo air intake - forgot to tighten it when reassembling - but otherwise would never have imagined MAF readings could cause such havoc and be narrowed down so readily.

    Cheers for the great info.
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