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should this happen ?

Discussion in 'Land Rover Freelander' started by ryanft58, Jul 29, 2012.

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  1. ryanft58

    ryanft58 New Member

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    just a quick question for td4 owners when you first start your motor do your revs move slightly up and down a few times or dose it find a spot and stay there?

    mine moves up and down and i think it is a problem but maybe this is what they do ?
     
  2. angeloc

    angeloc Well-Known Member

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    Mine moves up and down for a few seconds by a couple of hundred rpm - its just the ECU and injectors doing their compensation bit I suspect.
     
  3. NeilTD4

    NeilTD4 Active Member

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    Mine does it too, guess it's a case of "they all do that sir"
     
  4. James.

    James. Member

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    and diesel smelling white smoke too ? :p
     
  5. ryanft58

    ryanft58 New Member

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    well i had mine back from the indy for not even 24hrs and she has failed to start 3 times already
     
  6. NeilTD4

    NeilTD4 Active Member

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    What did you ask the Indy to do? I will pay more attention to the little bit of smoke I get on start up next time I start mine...
     
  7. nickcc

    nickcc Well-Known Member

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    Could just be the excess fuel (cold start) device giving extra fuel. Mine revs up slightly but soon settles down, doesn't do it when hot start.
     
  8. ryanft58

    ryanft58 New Member

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    would this cause the engine to fail to start ?
     
  9. nickcc

    nickcc Well-Known Member

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    No but a faulty LP pump (either in tank or under bonnet or if later model in O/S/R wheel arch) or MAF, injector or cam/camshaft sensor will. Cam/camshaft sensors usually fail when engine is hot, MAF can fail anytime as can injectors. Try disconnecting the MAF and see if the engine runs better, if it does then this points towards a faulty MAF. Can you hear the LP pump running when you switch on the ignition, if not then this points towards the LP pump. (fault can be intermittent) Have a read up, using the search facility, the how to check for injector leak back as this could also be your problem. This is all guesswork as without being able to see the fault makes accurate diagnosis nearly impossible.
    Good luck.
     
  10. ryanft58

    ryanft58 New Member

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    i have another thread in the freelander engine forum at the moment and have listed some of the things change which include

    fuel pressure sensor and harness
    lift pump (what ever pump that is )
    leak back test carried out ( 1 injector needed changed and was done)
    camshalft sensor was being changed but i havent heard anything from dealer so that probly didnt work.

    when you say disconect the maf is this done while the engine is running or can it be disconected and then started up
     
  11. nickcc

    nickcc Well-Known Member

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    No you just need to unplug the MAF and then restart the engine. The engine will then run on the ECU presets and not the MAF signal. If performance improves then this points towards a faulty MAF, if not just plug it back in.
     
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