Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[TheBoy]

Front flexy hose breaking down causing it too bulge during hard brakeing then return back to normal   

Heavy braking seems to be fine...

[Webby the Bear]

Its medium braking, moreso at 50+, the car noticeably pulls right, requiring steering left enough that releasing the brakes causes the car to snap left.


i've heard that braking wearing just socks can cause this. you need a sturdy pair of shoes imo

[Andy H]

Sticky caliper +1

Maybe there is a wear ridge on one caliper frame that prevents the pad from moving until 'firm pressure' is applied to the brake pedal?

I have never had a flex pipe break down internally but I have heard of it happening and causing mysterious problems

[05omegav6]

Had a 2.9 Granada that did similar. ABS pump was a bit slow. ie from cold the light would be a bit slow to go out.

Braking normally everything was fine, but every once in a while if you nailed the brakes only one side would work.(white face schocked smiley sitting in a brown patch).

 Only solution was to prime the brakes by touching the pedal, releasing it, then stamping it down. Sold the car to someone at work who kept it a while, but never found out what the problem was. ISTR that the Teves ABS wasn't the most reliable system.

[feeutfo]

Been working on two theorys, as said. Its eather brakes or bushes.

Ime symptoms are quite similar but, differant in subtle ways.
If bushes, when braking, the car goes straight but the steering wheel turns in your hands.
If brakes, when braking, the car pulls and the driver has to steer into the pull to keep the car straight.

From a passengers view the symptoms look exactly the same, as the driver has the steering wheel at up to 30 degrees off centre when braking. But the driver feels a very differant sensation through the wheel in his hands depending if...brakes or bushes/pull or twist(of the steering wheel in your hands)

Having driven the car early on, just after bushes done iirc, the car pulled left to the kerb, and had to be steered right to keep straight. There was also a Falken tyres symotom present when driving but that was proved to be tyres  and resolved....?
 Given master has done the bushes, and the car has to be steered away from the pull, i rekon brakes.

Whats confusing us, is that the pull apears to have swapped sides, and was described as random at one point. Either that or one or both of us is getting muddled with old age. 

If brakes, is it posdibke air in the abs pump could move channels and cause the air,and hence the pull, to swap sides?

[Lazydocker]

Having driven the car early on, just after bushes done iirc, the car pulled left to the kerb, and had to be steered right to keep straight. There was also a Falken tyres symotom present when driving but that was proved to be tyres  and resolved....?
 Given master has done the bushes, and the car has to be steered away from the pull, i rekon brakes.

Whats confusing us, is that the pull apears to have swapped sides, and was described as random at one point. Either that or one or both of us is getting muddled with old age. 

If brakes, is it posdibke air in the abs pump could move channels and cause the air,and hence the pull, to swap sides?

I agree that it's most likely to be brakes, having been in the car for the tests.

I'm also a little confused with the sudden change of side, although you do have to remember that it had those awful clown tyres on when I was in it so the pull was a little random anyway

ABS is where I'd be looking, doing a proper bleed with an assistant so the pump can be run too Nearly cured the issue on my saloon but the w/b bushes were also suspect

[blue_dream]

  Hi
      I had this on a mfl omega, pass mot with 100% brake test but still would try turning left under light braking only, found that the drivers side front wishbone  was defective at the front bush, totally f***d, went back the  garage and told him won,t i thought,
  replace both front wishbones, perfect, then you MUST have the front wheel aligment done   

[TheBoy]

Been working on two theorys, as said. Its eather brakes or bushes.

Ime symptoms are quite similar but, differant in subtle ways.
If bushes, when braking, the car goes straight but the steering wheel turns in your hands.
If brakes, when braking, the car pulls and the driver has to steer into the pull to keep the car straight.

From a passengers view the symptoms look exactly the same, as the driver has the steering wheel at up to 30 degrees off centre when braking. But the driver feels a very differant sensation through the wheel in his hands depending if...brakes or bushes/pull or twist(of the steering wheel in your hands)

Having driven the car early on, just after bushes done iirc, the car pulled left to the kerb, and had to be steered right to keep straight. There was also a Falken tyres symotom present when driving but that was proved to be tyres  and resolved....?
 Given master has done the bushes, and the car has to be steered away from the pull, i rekon brakes.

Whats confusing us, is that the pull apears to have swapped sides, and was described as random at one point. Either that or one or both of us is getting muddled with old age. 

If brakes, is it posdibke air in the abs pump could move channels and cause the air,and hence the pull, to swap sides?

Certainly possible air is still in there.

But, my understanding is that its a dual circuit, thus entirely independent, and not linked except at the reservoir above master cylinder, thus can't swap sides 

[TheBoy]

  Hi
      I had this on a mfl omega, pass mot with 100% brake test but still would try turning left under light braking only, found that the drivers side front wishbone  was defective at the front bush, totally f***d, went back the  garage and told him won,t i thought,
  replace both front wishbones, perfect, then you MUST have the front wheel aligment done   

Front wishbones are polybushed at the front, and have recently had the rears replaced.

[05omegav6]

Been working on two theorys, as said. Its eather brakes or bushes.

Ime symptoms are quite similar but, differant in subtle ways.
If bushes, when braking, the car goes straight but the steering wheel turns in your hands.
If brakes, when braking, the car pulls and the driver has to steer into the pull to keep the car straight.

From a passengers view the symptoms look exactly the same, as the driver has the steering wheel at up to 30 degrees off centre when braking. But the driver feels a very differant sensation through the wheel in his hands depending if...brakes or bushes/pull or twist(of the steering wheel in your hands)

Having driven the car early on, just after bushes done iirc, the car pulled left to the kerb, and had to be steered right to keep straight. There was also a Falken tyres symotom present when driving but that was proved to be tyres  and resolved....?
 Given master has done the bushes, and the car has to be steered away from the pull, i rekon brakes.

Whats confusing us, is that the pull apears to have swapped sides, and was described as random at one point. Either that or one or both of us is getting muddled with old age. 

If brakes, is it posdibke air in the abs pump could move channels and cause the air,and hence the pull, to swap sides?

Certainly possible air is still in there.

But, my understanding is that its a dual circuit, thus entirely independent, and not linked except at the reservoir above master cylinder, thus can't swap sides 

One or two sticking valves in the ABS block?

[Andy H]

I am not convinced by the air theory. It only takes a tiny amount of air to cause a spongy brake pedal and I cannot image TB being content to drive a car with a spongy brake pedal 

Following up on the sticky caliper/piston theory I wonder if it could be a sticky shuttle in the master cylinder? (IIRC the Omega has dual circuit brakes. The brake pedal acts on the main piston in the master cylinder which sends fluid to the brakes on one side of the car but also applies fluid pressure to a floating piston (shuttle). The shuttle applies pressure to the brakes on the other side of the car. If the shuttle is sticking then light braking would only go to one side but heavy braking would go to both.)

[TheBoy]

Been working on two theorys, as said. Its eather brakes or bushes.

Ime symptoms are quite similar but, differant in subtle ways.
If bushes, when braking, the car goes straight but the steering wheel turns in your hands.
If brakes, when braking, the car pulls and the driver has to steer into the pull to keep the car straight.

From a passengers view the symptoms look exactly the same, as the driver has the steering wheel at up to 30 degrees off centre when braking. But the driver feels a very differant sensation through the wheel in his hands depending if...brakes or bushes/pull or twist(of the steering wheel in your hands)

Having driven the car early on, just after bushes done iirc, the car pulled left to the kerb, and had to be steered right to keep straight. There was also a Falken tyres symotom present when driving but that was proved to be tyres  and resolved....?
 Given master has done the bushes, and the car has to be steered away from the pull, i rekon brakes.

Whats confusing us, is that the pull apears to have swapped sides, and was described as random at one point. Either that or one or both of us is getting muddled with old age. 

If brakes, is it posdibke air in the abs pump could move channels and cause the air,and hence the pull, to swap sides?

Certainly possible air is still in there.

But, my understanding is that its a dual circuit, thus entirely independent, and not linked except at the reservoir above master cylinder, thus can't swap sides 

One or two sticking valves in the ABS block?

Doing tech2 tests for testing for air in the circuits activates pretty much every solenoid in there, in no glitches detected....

[Kevin Wood]

I am not convinced by the air theory. It only takes a tiny amount of air to cause a spongy brake pedal and I cannot image TB being content to drive a car with a spongy brake pedal 

I agree. And I have some doubts as to whether it would cause uneven braking until it's very bad. My recollection of how a master cylinder works is that the circuits only separate when there is a a large difference in pressure between the two, so normally they act as one and are balanced.

I'm leaning towards a stuck caliper piston or slider, I think.

[feeutfo]

I guess altzhiemers caused the swap sides theory then     

[feeutfo]

There is also another thread with similar, also after bleeding brakes, but admitedly after numerous other suspension parts changed.