Quote:
Originally Posted by steamship
Was doing some searching, so just read through your posts again. We can assume you've eliminated the master cylinder and the ABS unit (no errors) as being the cause. I came across the following thread (post #4 in particular), and they mention about air still in the system. The mystery is your second quote above, how a 'few deep pushes' rectifies it. Note that the thread isn't about an Audi, but the principle should be the same:
https://turbobricks.com/index.php?th...riving.268140/
BTW Did you run the procedure in VCDS to bleed the ABS unit through the NSF caliper? |
Thanks for all the help.
I did nothing with VCDS other than scan for errors. I thought the pressure bleed with the engine running was enough to push fluid through the ABS pump, no?
I'm starting to think it may be the ABS module or maybe pump, as the pressing of the brake pedal almost down to the stop a few times when stopped at lights etc. is no longer working. It's very strange, today I drove 6 miles into the city centre, and another 6 miles back home again, and brakes didn't misbehave once. I then take the car out this evening and I haven't gone more then 100 yards from the house and I feel the brakes coming on. The other thing I thought I noticed this evening when they locked - I pulled in and put it in Park and pumped the pedal a few times, then tried it in Drive or Reverse and saw it was locked solid no matter how much pedal pumping I was doing. So I put it into Neutral and killed the engine. Within about 10 seconds I started to feel the car roll so started it up and was able to drive on. I'm tempted to buy one of those ABS pumps/modules off €bay although as I think about it now, if I can get my trusty ASZ Bora back on the road (busted sump) I'd probably be better off taking my own pump off and getting it reconditioned with a warranty etc.