classic`s abs

I have got problems with my ABS on a 94 LSE. It all started when I relpaced the inner wing and so undid the front brakes and moved the accumulator.

Now the pump will not stop even though I`m sure there is no air in the system. I have swapped the pump for another I know is ok and it does the same thing. I have changed the relays and the ecu all with no effect.

So now its seems that I am looking at swapping the abs/master clyinder together with its accumulator. I was wondering if anyone has any experience of doing this. I though that I may take out the pedal box with everything attached .

Any comments about the swap or possible cause for the pump not switching off would be great.

i have been there with this exact same problem mate. I pressure bled the friction system the manually bled the power system. I did this twice as i alway bleed twice no matter what car i am doing. This stop my pump from being on all the time. I was unsure when it came to bleed the ABS system on my range so followed the haynes book of lies and it did sort the problem out.

I don't want to teach you to suck eggs and hope that i am not. It is worth bleeding the system following the manual step by step.

thanks for the reply.

I have followed Haynes and cross checked with the green oval and done it twice, even went 25 miles to get a pressure bleed system, all to no avail yet. Feel resigned to swapping the pedal box incase a value has got stuck etc when I drained it , guess we`ll find out if it works tomorrow unless any other thoughts

charles b said:

I have got problems with my ABS on a 94 LSE. It all started when I relpaced the inner wing and so undid the front brakes and moved the accumulator.

Now the pump will not stop even though I`m sure there is no air in the system. I have swapped the pump for another I know is ok and it does the same thing. I have changed the relays and the ecu all with no effect.

So now its seems that I am looking at swapping the abs/master clyinder together with its accumulator.

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The ABS system is a pig to bleed. I spent what seemed like an eternity trying to get a good pedal after replacing all the brake pipes on my classic. If the pump won't stop running and you are happy the pressure switch is O.K. and the ECU is working properly then the only thoughts I would have is that the pressure accumulator is faulty or there is still air in the system.

The accumulator is charged with Nitrogen at up to 80 Bar I read somewhere in here about accumaulator losing pressure. It may well be that this is the problem.

I would be inclined to change the accumulator and then re-bleed the system. It would pay you to have a pressure bleeder and another pair of hands available for bleeding the system - it makes life so much easier.

Hope that helps.