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Author Topic: Pulls right under braking  (Read 4595 times)

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TheBoy

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Re: Pulls right under braking
« Reply #45 on: 17 October 2011, 21:06:25 »

Yes, up to an inch of slop at the steering wheel, say half inch at the road wheels perhaps...?

Should tighten up straight ahead. Is pitman arm straight ahead with steering wheel.
Cock, I knew there was something I wanted to check closely - it was blowing a friggin gale, so was keen to pack up ::)

It looked pretty straight, but I didn't check it that closely.
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feeutfo

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Re: Pulls right under braking
« Reply #46 on: 17 October 2011, 21:10:41 »

Yes, up to an inch of slop at the steering wheel, say half inch at the road wheels perhaps...?

Should tighten up straight ahead. Is pitman arm straight ahead with steering wheel.
Cock, I knew there was something I wanted to check closely - it was blowing a friggin gale, so was keen to pack up ::)

It looked pretty straight, but I didn't check it that closely.
as i recall, going by steering lock position comparison at Kasham stadium your isnt any further out than mine, not fully clued up on that mechanics though.

...and yes bix should tighten up with engine running.
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TheBoy

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Re: Pulls right under braking
« Reply #47 on: 17 October 2011, 21:12:19 »

Yes, up to an inch of slop at the steering wheel, say half inch at the road wheels perhaps...?

Should tighten up straight ahead. Is pitman arm straight ahead with steering wheel.
Cock, I knew there was something I wanted to check closely - it was blowing a friggin gale, so was keen to pack up ::)

It looked pretty straight, but I didn't check it that closely.
as i recall, going by steering lock position comparison at Kasham stadium your isnt any further out than mine, not fully clued up on that mechanics though.

...and yes bix should tighten up with engine running.
And in all other driving aspects other than medium braking, the car handles as expected. Bit of tramlining, but with the amount of camber it runs, thats to be expected?
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Marks DTM Calib

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Re: Pulls right under braking
« Reply #48 on: 17 October 2011, 21:25:56 »

Is it a brake inbalance or a pull under braking?
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TheBoy

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Re: Pulls right under braking
« Reply #49 on: 17 October 2011, 21:31:34 »

Is it a brake inbalance or a pull under braking?
Not sure how I'd tell the difference  :-[

MOT'd last month, with this issue (although assumed it was related to poor geometry then, so never asked about imbalance, but not mentioned at MOT).

Stamp of the brakes, it stops straight as far as I can tell.

Brake with medium effort at cruising speeds, and it veers right, causing you to steer into it. Releasing the brake shows how much angle you've had to give it, as it veers left ;D
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TheBoy

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Re: Pulls right under braking
« Reply #50 on: 17 October 2011, 21:33:10 »

Is it a brake inbalance or a pull under braking?
Not sure how I'd tell the difference  :-[

MOT'd last month, with this issue (although assumed it was related to poor geometry then, so never asked about imbalance, but not mentioned at MOT).

Stamp of the brakes, it stops straight as far as I can tell.

Brake with medium effort at cruising speeds, and it veers right, causing you to steer into it. Releasing the brake shows how much angle you've had to give it, as it veers left ;D
Other than braking, drives pretty straight, has 1'34 camber each side, slight tendency to tramline.
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feeutfo

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Re: Pulls right under braking
« Reply #51 on: 17 October 2011, 21:45:25 »

Yep, mine has -1.40 base setting and there is some tram lining. Back to 1.20 for me i think.  :-\

Tried the foot on wheel test? Any slop for and aft.?

Maybe get somebidy to drive the car and brake, while you look from outside the car for toe out as the car brakes...?
Either side on, or head on?    .... Although not sure how that would help i.d the fault thinking about it.

Or find a small kerb, like a down in a drive way about an inch high like mine for instance, and have an assistant drive over it slowly on neutral throttle without braking, see if the front road wheels move the same. Obviously there will be vertical suspension movement, but your looking for uneven for and aft slop in the road wheel. Watch spcifically at the gap between tyre and sill, if one wheel moves rearward to the sill when driving over a 1 inch or higher kerb, and the other doesnt, or the movement is uneven, then theres a bush or wishbone/control arm problem.


Who do we know with a long pit...?  Btw...  :-X
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Andy H

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Re: Pulls right under braking
« Reply #52 on: 18 October 2011, 07:36:05 »

Swapped front pads over between drivers and passenger side. Sod all difference.

Same time, double checked sliders (move freely) and pistons (come out evenly and smoothly when she pumped the pedal with no pads in).

Kinda out of ideas now...


Is the front subframe held to chassis on bushes?  :-\
So not considering a faulty master cylinder as the cause then :-\
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Marks DTM Calib

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Re: Pulls right under braking
« Reply #53 on: 18 October 2011, 08:57:24 »

Idler arm ok?
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feeutfo

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Re: Pulls right under braking
« Reply #54 on: 18 October 2011, 10:26:20 »

Idler arm ok?
Was rock solid when started investigating, a while ago now though.
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aaronjb

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Re: Pulls right under braking
« Reply #55 on: 18 October 2011, 11:30:42 »

Who do we know with a long pit...?  Btw...  :-X

I only have a little one...


But I hear it's not the size that counts... ;D
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henryd

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Re: Pulls right under braking
« Reply #56 on: 18 October 2011, 15:50:03 »

I know its been mentioned earlier but I have had flexy hoses that have bulged internally and can cause this sort of problem,last one I had like it suffered very similar symptoms to yours,ie it was ok when brakes were planted but caused a pull under normal braking. The giveaway was that when the bleed nipples were loosened fluid would drip from the good side but not the bad one unless brake pressure was applied.Maybe worth a try !.
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Re: Pulls right under braking
« Reply #57 on: 18 October 2011, 19:03:06 »

Idler arm ok?
Last knackered idler really showed up in normal driving, which is fine on this car.  This one has no vertical play.

I have a good one that I removed from MV6 last winter, again purely chasing a handling issue, that turned out not to be the idler.  Worth putting that on anyway?
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TheBoy

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Re: Pulls right under braking
« Reply #58 on: 18 October 2011, 19:06:42 »

Swapped front pads over between drivers and passenger side. Sod all difference.

Same time, double checked sliders (move freely) and pistons (come out evenly and smoothly when she pumped the pedal with no pads in).

Kinda out of ideas now...


Is the front subframe held to chassis on bushes?  :-\
So not considering a faulty master cylinder as the cause then :-\
Nothing ruled out, but reading Kevin Wood's reply was put it further down the list.
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TheBoy

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Re: Pulls right under braking
« Reply #59 on: 18 October 2011, 19:07:42 »

I know its been mentioned earlier but I have had flexy hoses that have bulged internally and can cause this sort of problem,last one I had like it suffered very similar symptoms to yours,ie it was ok when brakes were planted but caused a pull under normal braking. The giveaway was that when the bleed nipples were loosened fluid would drip from the good side but not the bad one unless brake pressure was applied.Maybe worth a try !.
With an easibleed, fluid comes out at about the same rate each side (when both nipples open at same time)
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