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Thread: Something ain't right !

  1. #1
    Forum Moderator FIL 4822's Avatar
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    Vehicle : Insignia VX-line RED Tourer

    Trim : No, over weight!

    Engine : Flux Core Capacitor

    Year : 1 A.D

    Mileage : Rising

    Question Something ain't right !

    Coming back from a fishing trip last yesterday evening, i had to slow rather quickly due to a crow stood in the road eating a road kill ! (not damaging my car !).
    The car stopped very quickly with the 314mm brakes but it squirmed all over the place !!!
    It was like i had no control of the direction the car was pointing.
    I had a new steering rack under warrenty last year so i can rule that out.
    It does tramline like a B*****d when the road surface is uneven.
    Could it be that there's some wear in the suspension bushes ?

    Any ideas, has anyone suffered/suffering the same ?


    Have consideration for the deaf, if you're gunna fart, make it smell !


  2. #2
    [Ex]Admin Duncan's Avatar
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    All springs intact?, and shocks in good order?

  3. #3
    Forum Moderator FIL 4822's Avatar
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    All seems ok.


    Have consideration for the deaf, if you're gunna fart, make it smell !


  4. #4
    Ex Vec-C Admin Deztroyer's Avatar
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    what was the road like Phil -

    flat - asphalt - tarmac ??

    main road - a class b class c class ?

    last time it rained in the area ?? was the road greasy ??

    tyres - new worn - make model pressures etc


    all could be contributary factors


    if your still concerned after ruling out the above

    - find a quiet flat road someowhere (old airfield - industrial estate) and try and replicate the braking conditions that applied and see if you get a similar imbalance - if you do maybe a caliper sticking - worth taking to a garage and asking them to do a MOT brake test on the rollers to see if theres an imbalance

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

  5. #5
    spoons
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    Quote Originally Posted by Duncan View Post
    All springs intact?, and shocks in good order?
    + Tyre Pressures Correct?
    + Whats the tyre tread depth like at the front? (check all over the surface, inside edge and outside edge)
    + Did you brake in a dead straight line? or were you turning slightly when braking?

  6. #6
    Forum Moderator FIL 4822's Avatar
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    Quote Originally Posted by deztroyer View Post
    what was the road like Phil -

    flat - asphalt - tarmac ??

    main road - a class b class c class ?

    last time it rained in the area ?? was the road greasy ??

    tyres - new worn - make model pressures etc


    all could be contributary factors


    if your still concerned after ruling out the above

    - find a quiet flat road someowhere (old airfield - industrial estate) and try and replicate the braking conditions that applied and see if you get a similar imbalance - if you do maybe a caliper sticking - worth taking to a garage and asking them to do a MOT brake test on the rollers to see if theres an imbalance

    I'm happy its not the brakes but the tyres are about 2mm shy of the wear bars. They are Bridgestones Potenzas @ 38psi iirc.
    The road was a good flat 'A' road and was bone dry.
    Quote Originally Posted by spoons View Post
    + Tyre Pressures Correct?
    + Did you brake in a dead straight line? or were you turning slightly when braking?
    As said Steve, 38psi iirc and breaking in a dead straight line on flat even road surface.


    Have consideration for the deaf, if you're gunna fart, make it smell !


  7. #7
    spoons
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    Quote Originally Posted by FIL 4822 View Post
    As said Steve, 38psi iirc and breaking in a dead straight line on flat even road surface.
    I have 42 Psi in the fronts and 38 psi in the rears. Dont know what a 2.0Turbo needs?

    Very strange, I'd be inclined to check the shocks and springs (especially knowing how easy the Vectra springs snap)..

    Time to get rid of it in my opinion.... go get a nice VXR instead

  8. #8
    Forum Moderator FIL 4822's Avatar
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    I had 38 rear and 40 front, but when i mentioned tramlining, it was recommended that i drop the fronts to 38.

    I'm going to put the fronts to 42 at see how that goes.
    No VXR for me Steve, i want a BMW 530d Touring and keep the 2.0T as my ongoing modifying project .


    Have consideration for the deaf, if you're gunna fart, make it smell !


  9. #9
    spoons
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    Quote Originally Posted by FIL 4822 View Post
    I had 38 rear and 40 front, but when i mentioned tramlining, it was recommended that i drop the fronts to 38.

    I'm going to put the fronts to 42 at see how that goes.
    Well I notice a massive difference on heavy braking if the pressures fall below 42 psi on the fronts. The car twitches all over the place...

    If you want to get rid of tramlining, switch to 18" Alloys and tyres, I dont get any tramlining ... keep the Snowies for show... get some nice light racing 18" alloys for playtime..

  10. #10
    Regular Member Das's Avatar
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    Is it possible there's a brake imbalance? Maybe one caliper not as free as the other 3?

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