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Thread: Signum 2.0DTI 2005 Losing Power, Sopunds Like a 1980's Transit

  1. #1
    Regular Member Buzzby's Avatar
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    Default Signum 2.0DTI 2005 Losing Power, Sopunds Like a 1980's Transit

    I've been having some trouble on and off for a few months now. I'd get to about 3000rpm, and the powere would fade. Still enough to cruise at 65/70, but no acceleration, feels like the turbo had gone. As time has gone on, I appear to have lost all use of the turbo, car is extremely flat and sluggish.
    Last Thursday, car stalled at an island less than two minutes from home. Stopped, turned off, waited and restaredt after 1 minute. Got back, but whilst turning round to bring car facing back the right way, stalled three further times.
    Drove into work ok in the morning, then i dropped it into the garage next door to work. They diagnosed it as split vacuum hoses. replaces two? then ran it, and ran fine. I drove home, car had more life and grunt than I remebered. Got some real acceleration back now.
    All was well until the following day. After a bit of toing and froing, from shops, to mates, to parents, etc car lost all power again. Once more, I was minutes from my folks, so pulled in there. Went back half hour later, ran fine again.
    Drove ten minutes back towards home, around a couple of minutes into the journey, power flickered for a minute, but then recovered to take me home effortlessly. Stopped off at the shop fo0r a couple of minutes, tried to restart the car, and it sounded like a tractor. Engine pitch had dropped and sounded very tinny/rattly. Stalled as I pulled out of parking bay. My wife walked our daughter the few minutes back home, as I tried to limp the car home, she said it was that noisy she could hear it in the next street.
    That seems to have been the genaral theme. Runs fine, but as car warms up, power flickers, and either stalls then sounds like a 1980's transit van, or I manage to ease it through carefully without any further stalling.
    Took it back into garage today, they said the vac hoses are fine, but the note of the codes they gave me says -
    P0335 - crankshaft position sensor - circuit malfunction.
    P0340 - camshaft position sensor A circuit (bank 1 or single sensor)circuit malfunction.

    Can anyone point me in the right direction, before I have to bite the bullet and take it to the local Vauxhall dealer and part with some more serious cash, or realistically is that my only real option left....
    And please allow for the fact that I am absoloutely clueless regarding mechanical issues with cars... so nay hints or tips need to be in as basic a language as you can... or at least something repeatable to my mate at work.

  2. #2
    Regular Member carperjake's Avatar
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    Vehicle : Signum

    Trim : Elegance CDTi 120

    Engine : 1.9

    Year : 05

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    Have they used the right size hoses? I replaced mine with a 3mm hose and it started doing the same as yours as it blew off the sensor on the slam plate, swapped it back to a 4mm and it's fine again. Recheck the hoses to make sure they are all in place mebbe?

    And I cleaned up the EGR valve and the sensor, they weren't totally crudded up but definately needed cleaning.

    http://www.vectra-c.com/forum/showth...I-boost-sensor

    http://www.vectra-c.com/forum/showth...-on-dti-engine
    Last edited by carperjake; 30th July 2012 at 16:55.

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    Regular Member Buzzby's Avatar
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    Not sure. I did purchase some silicone hose to relace them myself following advice found on here previously, but due to a lack of expertise I never really got round to it.

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    Quick update. Drove ten minutes to collect my daughter from her grandparents after work, fine. Half hour later drove the ten minutes or so home, fine. Ten to fifteen minutes later again, headed back out, only got a couple of minutes from home and the car lost power, chugging along then stalled. Managed to ease it home, but once again, it rumbled and rattled like an old tractor, both in terms of performance, and also the sound of the engine. It really rattles and groans.

  5. #5
    Regular Member DTi Elite's Avatar
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    Vehicle : Vectra

    Trim : Elite

    Engine : 1.9 cdti 150

    Year : 2007

    Mileage : 145k

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    change the crank sensor & cross your fingers it cures it .
    lad at work having the same problems with 53 plate zafira & it turns out to be a knackered diesel pump .

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    Anyone have any experience of having this or something similar and having it fixed??
    The one thing I have noticed is, it seems to be almost temperature related, once the temp gauge hits 90, that's when the problem occurs. If the car is left for a good while, commuting to and from home is fine, but if I am in and out of the car doing multiple trips in a short space of time, without allowing a cool off period, that is when it plays up.
    Any clues????

  7. #7
    Regular Member DTi Elite's Avatar
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    Vehicle : Vectra

    Trim : Elite

    Engine : 1.9 cdti 150

    Year : 2007

    Mileage : 145k

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    lad at work has been doing research into the same problem on his zafira , apparently there is some kind of ribbon connector inside the pump & the solder joints fail , warming the joints up with a blowlamp until the solder melts & cools is supposed to be a repair ( or so he has been told )

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    Sounds exactly like the problem i am having!

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