Possible ABS Issues

[TheTree]

Hi

I have noticed that when i get in the car first thing in the morning, I can almost push the brake pedal to the floor, it also takes at least 30 sec for the pump to stop running, almost twice what rr.net says.

I think it may be the accumulator, but I am wondering about the wisdom of putting a new accumulator on an old pump. I note the new pumps come with an accumulator.

Any suggestions as to whether i have a potential or immediate problem?

Thanks
Steve

[benji]

Id tend to think that if the pump sounds good then I'd be the accumulator, though I'm sure that the long pedal stroke suggests the accumulator also.
How many brake applications do you get out of a charge?

[poleonpom]

Sounds like the accumulator. Easy and cheap to replace. Mine did exactly the same :)

[TheTree]

Thanks for the replies, the pump itself is pretty noisy as well.

rr.net seems to say if you can hear it from within the cab, then you have a potential problem. I can certainly hear mine very clearly :(

I also get only a few brake pedal applications before the pump starts up again.

Good news is that a working second hand P38 ABS pump was listed on eBay last night so I grabbed it, I will drop it in next week :cool:

Then back to my EAS pressure loss :eek:

Regards
Steve

[mtb_gary]

Steve

The brake bleeding when you change the pump is a pain in the posterior. Follow the RAVE instructions carefully. Take your time, have someone in the drivers seat who is patient and can follow instructions. End result well worth it to get fresh brake fluid in the system!

Gary

[TheTree]

Steve

The brake bleeding when you change the pump is a pain in the posterior. Follow the RAVE instructions carefully. Take your time, have someone in the drivers seat who is patient and can follow instructions. End result well worth it to get fresh brake fluid in the system!

Gary

Gary,

Thanks for the tip, I changed the brake fluid about 3 weeks ago, but we didn't bleed the control block, but we did note that the bleed screws were not exactly easy to get at !

Steve

[PeterH]

I went and got a long spanner to get at the back bleed screws, they are in a very awkward spot.
I have just ordered a new abs accumulator myself, my brakes were usless for a few seconds when the car first started in the morning, I can also hear the pump working briefly every time I brake.
I also had the 3 amigos lighting up briefly every now and then when braking.
Apparently those things are all accumulator failure signs.
Will be putting that in tomorrow or Wednesday, will let you know how it goes.

[mtb_gary]

If you remove the expansion tank it becomes much easier to access.

Gary

[poleonpom]

When the expansion tank is removed the back bleed screws are easy to get to with a normsl spanner. If, like me, you're jonny-no-mates, you can still bleed the system by yourself. It's a bit weird and feels like some deranged inititistion ceremony, bug it works :-)

[TheTree]

Thanks for all the tips, I am replacing the heater hoses and the expansion tank hoses as well, so it looks like the ABS and the hoses get replaced in one go !

Steve