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Thread: Signum 2.8V6T idle speed high

  1. #1
    Regular Member BYGino's Avatar
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    Default Signum 2.8V6T idle speed high

    Hi all,

    I've had my new Signum for a couple of weeks now and have just noticed something that doesn't seem right. I haven't spent any time diagnosing the problem yet but I thought since everyone over here is so knowladgable and helpful, I thought would ask here just in case anyone has seen this before. The car is overdue a service and I'm just waiting on the parts to arrive so the service may actually cure the problem but I really think it's something else.

    When I first start the car it idles pretty high (somehwere between 1200-1500 RPM) and seems to stay like this for ages (haven't really left it for any great length of time though to see if it will go away.) The minute I move from park into drive or reverse it drops down to about 800 RPM or so and if I move it back to park again it doesn't go back up and idles away quite happily round about where it should be.

    Has anyone else seen this on a 2.8 Auto?

  2. #2
    Regular Member PORKBALLS29's Avatar
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    Its the same on all the 2.8s mate so nothing to worry about. Mine, Dez's and Ian(Soulman) all do this.

  3. #3
    Regular Member Ziggy's Avatar
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    Vehicle : Saab

    Trim : 9-3 Vert

    Engine : 2.0

    Year : 2000

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    As H said they all do it! worried me also

  4. #4
    Ex Vec-C Admin Deztroyer's Avatar
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    yaaarp .... prefectly normal

    holds for upto a minute then drops to about 1000rpm until you pull away

    0-Large smile ......every time it's driven

  5. #5
    Regular Member Penfold101's Avatar
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    It's because they're petrols so have naff-all torque and risk stalling at low RPM's when they're cold...


  6. #6
    Regular Member BYGino's Avatar
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    Phew, was a wee bit worried there, thought I was in for diagnostics fun!

    Thanks guys.

  7. #7
    New Member Tmd's Avatar
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    I find when cold mine revs to 1200 Or 1400 or so, I sit and wait 30secs then it drops to idle at about 800 rpm then I select D and drive off. If you try to select D or R when revs are high it clunks a little so I prefer to wait till revs drop. Try it I think it's kinder on the box.

  8. #8
    Forum Moderator soulman's Avatar
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    Vehicle : Vauxhall

    Trim : Astra Twin Top

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    Year : 07

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    Quote Originally Posted by Penfold101 View Post
    It's because they're petrols so have naff-all torque and risk stalling at low RPM's when they're cold...

    hmmmmmmm 350ftlb you want more ??? lol

    and yes mine does the same ....but sounds sweet with my exhausts

  9. #9
    Regular Member luke4487's Avatar
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    The Ford Focus ST's do it also... I think its less of a torque problem (as for 100 years petrols managed without the high rev startup) and more to do with the turbo...

    The handbook advises against letting the engine warm up on idle... some say this causes more damage as the oil can't get to all of the right places with such slow speed of movement... therefore, slightly higher revs would produce a lot more oil splash and coat all the right places quicker, while still being low enough not to cause any unnecessary wear to internals.

    Thats my theory anyways... and because of that I always let it drop before driving off

  10. #10
    Regular Member BYGino's Avatar
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    Ahh, that makes sense I guess. I really should just wait the 30secs or so before hammering the gas then!

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