The mystery of my brakes!
Discussion
Car is Audi A6 C5 Avant 1.9 TDI manual on 173,000 miles (driven 150-200 miles a week)
Bought the car in June 2018, all was well.
December 2018, light comes on, I check the fluids, top up brake fluid, about 50ml and light goes off.
6 months later, light comes on, top up another 50ml of brake fluid and light goes off.
THEN early October 2019, I get a raised idle, the car normally revs at 800-900 rpm on cold but it now revs at 1,000 or just over. One day I get in the car and the brakes are GONE! No stopping at all until the pedal is down to the floor and I can feel the discs. I asked my friend if he could help. I bought a second hand brake servo/master cylinder, he fitted it and it was all back to normal, but I still had a raised idle.
Early December 2019, about 6 weeks after the brake servo was fitted, the brakes had gone AGAIN! But now I'm losing brake fluid again, I topped up the brake fluid a full 500ml and after 24 hours the brakes were back to full power.
January 2019, the light on dash comes on again, and one day the brakes had gone! This is the 3rd time since October the brakes failed. However the difference is that when I push the brakes hard, nothing happens but when I press the pedal slowly, it actually does a good job of slowing the car down. Also im now losing random amounts of brake fluid, maybe 500ml in a week, and and then lose nothing after 3 days.
So can someone shine some light on what is going on? And please consider
The raised idle has been constant since October, even after the replacement servo, yet the revs drop to normal after a few mins.
Why am I losing random amounts of brake fluid?
Why do the brakes work on a slow press but not when I push them hard?
Is there a link between a raised idle and poor brakes?
What do you think my problem is?
Thanks for any help or advice!
Liam
Bought the car in June 2018, all was well.
December 2018, light comes on, I check the fluids, top up brake fluid, about 50ml and light goes off.
6 months later, light comes on, top up another 50ml of brake fluid and light goes off.
THEN early October 2019, I get a raised idle, the car normally revs at 800-900 rpm on cold but it now revs at 1,000 or just over. One day I get in the car and the brakes are GONE! No stopping at all until the pedal is down to the floor and I can feel the discs. I asked my friend if he could help. I bought a second hand brake servo/master cylinder, he fitted it and it was all back to normal, but I still had a raised idle.
Early December 2019, about 6 weeks after the brake servo was fitted, the brakes had gone AGAIN! But now I'm losing brake fluid again, I topped up the brake fluid a full 500ml and after 24 hours the brakes were back to full power.
January 2019, the light on dash comes on again, and one day the brakes had gone! This is the 3rd time since October the brakes failed. However the difference is that when I push the brakes hard, nothing happens but when I press the pedal slowly, it actually does a good job of slowing the car down. Also im now losing random amounts of brake fluid, maybe 500ml in a week, and and then lose nothing after 3 days.
So can someone shine some light on what is going on? And please consider
The raised idle has been constant since October, even after the replacement servo, yet the revs drop to normal after a few mins.
Why am I losing random amounts of brake fluid?
Why do the brakes work on a slow press but not when I push them hard?
Is there a link between a raised idle and poor brakes?
What do you think my problem is?
Thanks for any help or advice!
Liam
Edited by liamthedude on Friday 24th January 10:11
Edited by liamthedude on Friday 24th January 10:19
Thanks for your reply, I am getting the car looked at on Sunday.
The M/C I bought was used.
I've looked under the car. On the O/S/R there is a spring like thing behind the caliper? Well it's dry but on the N/S/R that spring is wet/damp.
I'm trying to upload the pictures but the pics are 4mb and I don't know how to shrink them to 2mb so I can post on this thread.
The M/C I bought was used.
I've looked under the car. On the O/S/R there is a spring like thing behind the caliper? Well it's dry but on the N/S/R that spring is wet/damp.
I'm trying to upload the pictures but the pics are 4mb and I don't know how to shrink them to 2mb so I can post on this thread.
Thank you everybody for your input, it has also been suggested that I just buy a new caliper for this corner?
As we have not seen rain for a week, the road is dry but there is a small wet patch of road next to this tyre
Also, I apologize for the title, I didn't mean to make it sound like click bait, but I can't change it now.
As we have not seen rain for a week, the road is dry but there is a small wet patch of road next to this tyre
Also, I apologize for the title, I didn't mean to make it sound like click bait, but I can't change it now.
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