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Discussion Starter #1
This is a follow up question regarding bleeding the brakes. What I am unsure about is what is the significance of immobilising the ABS. I've never bled brakes on a car with ABS. It's always been a straight forward proccess of bleed out the air and old fluid - job done. But I've read you need to remove the ABS fuse or relay or both. But why, what actually happens if you don't?
Vacuum bleeding is also a new concept for me too but now I've seen a few you tube videos on the subject I can understand how it works and feel confident enough to carry out that part of the process.
 

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hydro, I've no idea myself, hence why, one week after replacing the rear discs and pads myself, my car is booked in tomorrow morning to have a brake fluid change at the garage. Weird isn't it? I consider myself competent enough to do stuff like discs and pads, but as for bleeding brakes, nah, I'll leave that to people who do it all the time and have the kit to just crack on. It's costing me £45 and that'll be it then for the next 3 years.
 

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I need to get mine sorted. Although the car brakes quite well, if I rapidly pump up the pedal several times times then hold on the pressure the pedal goes hard and then slowly sinks to the floor. A definite indication of air in the system.
 

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I have an 03 9-3 SS and you do not need to remove any abs fuses or anything, it is a straight forward job....take calipers rotors + calipers off, Rewind caliper piston, replace pads and rotors, put caliper back on.... as far as bleeding the brakes it is the easiest part of the job if you have another person there... if your brake pedal is slowly sinking to the floor then all you should need to do it bleed the lines, if it continues to do this then there is probably a small leak somewhere in your line, check your brake fluid.
 

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Ok, so brake fluid all changed today at the Saab independent specialist I use. Now I know why I just don't bother doing jobs like changing brake fluid myself. Today is/was a very wet day, car goes into garage, onto four post lift, wheels off, one man with vacuum bleed kit and does the job properly, not me fart arsing around on my driveway worrying about whether I'm going to get air in the system etc. Well worth the 40 odd quid to let someone qualified to do the job, do it and even more than happy to keep a local business in work! Plus my maintenance book gets an official job done stamp in it.

The one thing I noticed straight away on arriving home and lifting the bonnet to check all was well, was just how clean the new fluid looks in the reservoir (no, I didn't take the cap off!), compared to the three year old fluid that was previously in there, which was, well, dirty.
 

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Discussion Starter #7
Good job done then. Apart from your brake fluid reservoir looking all nice and clean, has it improved yr braking efficiency at all ;-D
 

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Good job done then. Apart from your brake fluid reservoir looking all nice and clean, has it improved yr braking efficiency at all ;-D
Well, seeing as it was absolutely peeing it down all day yesterday, my return trip back up the A38 from Derby was pretty foul, so I wasn't ragging it and I wasn't stomping on the brakes! Car stops just fine and I've seen an overall improvement anyway just with the new discs and pads on the rear which of course I'm still bedding in for the first couple of hundred miles.
 

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Spongy pedal, probably air in the system................. How did it get there?

Pumped up hard pedal and then slowly going down is probably fluid bypassing the master cyliner seals.

Brake bleeding with abs is the same as bleeding any system.
 

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One thing that's got my brain cell working is the op dose not say whether this is happening with the engine on or off ? . I know on mine at one time my pedal would go hard after pumping it a couple of times at standstill with the engine running , it was diagnosed as a faulty servo hose or something . Sorry but my mind is not what it use to be .:crazy:just a thaught .
 

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Discussion Starter #11
I had the engine running. I pumped the pedal quickly and then held on the pressure. I know the pedal will go harder if the engine is off as you pump all the air out of yr servo. I'm going to invest in a vacuum bleeding kit and get mine and possibly the the Mrs car done together. Both cars are the same year so I may as well do both at the same time. It's got to be air.
 
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