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Thread: Silly Question but Advice Appreciated

  1. #1
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    Default Silly Question but Advice Appreciated

    I have 2005 1.9 SRI from new thats done 63K and to be honest have never really driven it hard. I have had a few issues lately and it seems to me the whole thing it probably well sooted. I was thinking on my next long drive to give it a bit of a 'go' as it seems this is good for the engine. I was thinking, say after an hour or so of motorway cruising, to take it up to the red line in 2nd or 3rd and give the engine a 'clean'. (I don't think I've ever taken it over 3K!). Question is - how long for? I would have thought a couple of seconds would be useless but too long (what is too long?) could cause damage. If this is a good idea what sort of time, running close to the red line, would be good for the engine? I accept I may have to do this a few times. Thanks.

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    Regular Member Grumpy1954's Avatar
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    Vehicle : Ford Kuga

    Trim : Titanium

    Engine : 2.0dtci

    Year : 2014

    Mileage : 1200

    Default

    I do a motorway run or similar, 20- 100 miles each way, mostly at legal speeds, dpf regens, no signns of probs with egr. Think as long as you let it fully warm up and stay there long enough to regen if dpf fitted and it needs it you'd be ok.
    What issues are you having? Why do you think it's sooted up?

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    Default

    Thank you for reply. I have a problem with power loss and posted a question on this site a little while ago. A suggestion was clean the booster sensor and DPF regen'ing. I understand the DPF under the car but I am not familiar with the term DPF regen'ing. You mentioned it in your reply. Is there some sort of process that happens at some point re DPF regen'ing? My understanding is this is shorthand for some sort of regeneration of the DPFilter - are we saying that running the engine very hot for periods of time (how many minutes) has the effect of cleaning the insides of the DPF. Sorry if I appear dumb - I had a look in my handbook and there was no mention of this.

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    Vehicle : CDTI 150

    Trim : Design

    Engine : Z19DTH

    Year : 2005

    Default

    DPF - Diesel Particulate Filter.
    As its name implies a section of the exhaust collects the lumpy bits left after combustion.
    As the amount of 'particles' increase the flow of exhaust gasses decreases.
    To prevent it all blocking up the ECU software commands a 'regeneration'.
    It achieves this by monitoring the pressure either side of the DPF and hence flow.
    Once the flow gets restricted the regen occurs.
    To regen the engine has to be at normal operating temp and running above 2K(ish).
    The ECU then overfuels the system which increases the temp in the DPF thus burning off the 'particles'.
    Process takes about 20 mins.
    So if you only bimble into town and back the DPF can get clogged with no proper chance to regen. Also cheap supermarket fuels dont help.
    So best practice for a CDTI is to give it an 'Italian tune' every now and then, i.e. get it warm and drive it in a lower gear than normal for a little while, no real need to redline it just 'exercise' the rev range.

    p.s. there is no such thing as a silly question...... not asking and c*$!king up is far sillier

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    Full Member merikiito's Avatar
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    Vehicle : Insignia CDTi SRi NAV 160

    Trim : SRi

    Engine : A20DTH

    Year : 2009

    Mileage : 88000

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    The hatchback/Saloon does not have a DPF. Only the Signum and Estate have the DPF
    Lois Griffin: Peter! You're bribing your daughter with a car?
    Peter Griffin: Ah, c'mon, Lois, isn't 'bribe' just another word for 'love'?

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    Default

    Thank you all for your advice. Seems I haven't got a DPF - 2005 hatchback CDI / SRI. Guess I need to give the engine a little more revs during 'runs' every now and then so that it gets really hot and blows a lot of the muck out. I tend to drive very light footed and never go above 80 so the engine probably needs a good 'blast'.

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    Default

    I tend to take mine over 3000 rpm once a journey to try keep the egr valve clean ish, other than that if i get lazy I sit at 70 in 4th for a couple of miles done the motor way maybe thats something you can do ?

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    Default

    'Back in the day' I can remember, once in a while, getting the engine hot, taking out the plugs and dropping in some Redex. Todays' engines, especially sophisticated deisels, are different beasts altogether. However, are there products that one can use in the Vectra C engine to help give it a clean?

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    Regular Member Derek Mc's Avatar
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    Default does this make sense

    D'oh sorry hit the wrong button
    Last edited by Derek Mc; 9th February 2011 at 09:55.

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    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

    Default

    Accelerate through lower gears giving it the beans up to 4500rpm. Diesels love that

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