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[feeutfo]

Brake imbalance, air in system maybe. They do tow out under braking, look at the side that does not toe out for brake efficiency
Or
Fubar bushes, the side that toes out loosing control of the suspension arm. Lever the wishbones about with a pry bar, do they feel the same both sides?

Are all the parts matched pairs. Like wishbones, shocks, springs, and all the brake components?

Thanks - all checked new powerflex put in and rock solid everything is good. Have managed to source another vehicle and I am definately convinced there is imbalance in the brakes. Master cylinder, hoses, pipes, discs, calipers and pads etc are all checked or replaced so now we will start swaping abs parts from the donor to see if we can find a faulty item. I am not throwing any more money at this until i can isolate the culprit part! If this fails i am throwing in the towel!

Any other ideas welcome please

Do you have acess to a code reader that can activate the abs to aid bleeding and get any air out? If it's pulling left check the right side for air in the system, ESP if work done on that side.

Front wishbone bush is polly now you say, what about the rearward vertical bush? (sorry, speed reading this a bit. On a crap connection)

[cem_devecioglu]

I am watching this thread with interest.. as mine sometimes behaves similiar..
many things can cause that behaviour..

brake calipers,pistons, shocks, wishbones, front geometry items, tire pressure difference etc..

is there any play (gap) in steering ?

and also during checks a faulty item may be, not controlled completely :-/

also measure the distances of all tires to bumpers..

[wildhog70]

are all the tyers the same size??

Yeah all the same, again brand new.

[wildhog70]

I am watching this thread with interest.. as mine sometimes behaves similiar..
many things can cause that behaviour..

brake calipers,pistons, shocks, wishbones, front geometry items, tire pressure difference etc..

is there any play (gap) in steering ?

and also during checks a faulty item may be, not controlled completely :-/

also measure the distances of all tires to bumpers..

Was trawling the web last night and came across a guy who sounded like me, same issue tried and replaced all of the above and more and eventually came to the ABS pump. Apparently the pump faults dont show up on the computer but are a common fault item on omegas! not my words but theirs.

Any ideas or knowledge on these. Heard anything about them??

[wildhog70]

Brake imbalance, air in system maybe. They do tow out under braking, look at the side that does not toe out for brake efficiency
Or
Fubar bushes, the side that toes out loosing control of the suspension arm. Lever the wishbones about with a pry bar, do they feel the same both sides?

Are all the parts matched pairs. Like wishbones, shocks, springs, and all the brake components?

Thanks - all checked new powerflex put in and rock solid everything is good. Have managed to source another vehicle and I am definately convinced there is imbalance in the brakes. Master cylinder, hoses, pipes, discs, calipers and pads etc are all checked or replaced so now we will start swaping abs parts from the donor to see if we can find a faulty item. I am not throwing any more money at this until i can isolate the culprit part! If this fails i am throwing in the towel!

Any other ideas welcome please

Do you have acess to a code reader that can activate the abs to aid bleeding and get any air out? If it's pulling left check the right side for air in the system, ESP if work done on that side.

Front wishbone bush is polly now you say, what about the rearward vertical bush? (sorry, speed reading this a bit. On a crap connection)

Just responded to another note but thought i ould send this to you as well, Was trawling the web last night and came across a guy who sounded like me, same issue tried and replaced all of the above and more and eventually came to the ABS pump. Apparently the pump faults dont show up on the computer but are a common fault item on omegas! not my words but theirs.

I believe the old way to bleed them was with a code reader and I was wondering does this omega fall within the age when that proceedure was carried out. I know it can reset the system. There are also firms who specialise in rebuilding the pump and give a warranty as i am sure the price of a new pump would be horrendous

[feeutfo]

Abs ecu failure is a known issue. But the symptoms are all electronic, no speedo, no traction control, abs light on dash, although abs failure is not electronic, if you see what I mean, it does not affect braking performance.

Yours is a mechanical fault. I only mentined abs because it's almost possible to bleed air from the abs pump, unless fired remotely via tech2 or similar diagnostic computer.

[wildhog70]

Abs ecu failure is a known issue. But the symptoms are all electronic, no speedo, no traction control, abs light on dash, although abs failure is not electronic, if you see what I mean, it does not affect braking performance.

Yours is a mechanical fault. I only mentined abs because it's almost possible to bleed air from the abs pump, unless fired remotely via tech2 or similar diagnostic computer.

so its possible to get air trapped in the abs pump even though it is believed the system has been purged after a brake fluid change. So a brake fluid change should be done in conjunction with the proper diagnostic kit tapped into the abs?

[cem_devecioglu]

I am watching this thread with interest.. as mine sometimes behaves similiar..
many things can cause that behaviour..

brake calipers,pistons, shocks, wishbones, front geometry items, tire pressure difference etc..

is there any play (gap) in steering ?

and also during checks a faulty item may be, not controlled completely :-/

also measure the distances of all tires to bumpers..

Was trawling the web last night and came across a guy who sounded like me, same issue tried and replaced all of the above and more and eventually came to the ABS pump. Apparently the pump faults dont show up on the computer but are a common fault item on omegas! not my words but theirs.

Any ideas or knowledge on these. Heard anything about them??

abs fault is common to miggies but as Chrisgixer mentioned wont have effect in your problem..

at least when the abs pump becomes active you will hear its noise imo..

[feeutfo]

Abs ecu failure is a known issue. But the symptoms are all electronic, no speedo, no traction control, abs light on dash, although abs failure is not electronic, if you see what I mean, it does not affect braking performance.

Yours is a mechanical fault. I only mentined abs because it's almost possible to bleed air from the abs pump, unless fired remotely via tech2 or similar diagnostic computer.

so its possible to get air trapped in the abs pump even though it is believed the system has been purged after a brake fluid change. So a brake fluid change should be done in conjunction with the proper diagnostic kit tapped into the abs?

Basically your correct, but ordinarily shouldn't need tech2 to bleed the abs pump. If all goes normally all air and excess fluid should come out of the bleed nipple. However if the reservoir runs out of fluid and draws air in instead of fluid then there will be air in the abs pump. Only then will tech2 or diagnostic computer be needed.

[wildhog70]

Abs ecu failure is a known issue. But the symptoms are all electronic, no speedo, no traction control, abs light on dash, although abs failure is not electronic, if you see what I mean, it does not affect braking performance.

Yours is a mechanical fault. I only mentined abs because it's almost possible to bleed air from the abs pump, unless fired remotely via tech2 or similar diagnostic computer.

so its possible to get air trapped in the abs pump even though it is believed the system has been purged after a brake fluid change. So a brake fluid change should be done in conjunction with the proper diagnostic kit tapped into the abs?

Basically your correct, but ordinarily shouldn't need tech2 to bleed the abs pump. If all goes normally all air and excess fluid should come out of the bleed nipple. However if the reservoir runs out of fluid and draws air in instead of fluid then there will be air in the abs pump. Only then will tech2 or diagnostic computer be needed.

So, just to confirm that air in the abs pump, could effect or cause brake imbalance. This is the last thing we have to try. If its not this then my car is possessed.

Making inquiries now to trace a tech 2

[hotel21]

Whereabouts do you live?  If you add it to your profile, might make your search a bit easier.....   

[feeutfo]

There's 3 or 4 or on here, where are you? Uk?

[feeutfo]

Also ask, is it possible the brake fluid reservoir ran out of fluid...?

[wildhog70]

Also ask, is it possible the brake fluid reservoir ran out of fluid...?

Thanks for your messages!

Trying to trace a donor ABS pump. Do you know if the pump on the 30ltr is different from other models or are there any that carry the same one. Trying to shorten my time. If i can try another pump from a donor car and it doesnt rectify the problem then i am totally beat. But at least i will not be out more money buying another replacement part I dont need!

[feeutfo]

Also ask, is it possible the brake fluid reservoir ran out of fluid...?

Thanks for your messages!

Trying to trace a donor ABS pump. Do you know if the pump on the 30ltr is different from other models or are there any that carry the same one. Trying to shorten my time. If i can try another pump from a donor car and it doesnt rectify the problem then i am totally beat. But at least i will not be out more money buying another replacement part I dont need!

Seeing as this is the most awkward part due to lack of a code reader, I would suggest exhausting all other possibilities, double check everything, I appreciate you'r out of options but it's always worth going over the basics, then find a tech 2 to bleed the abs pump.

Replacing the abs pump will obviously leak air into all four brake lines and still need bleeding x4 etc.

Only replace parts once proved faulty. The abs pump itself is rarely problematic.