Thread: Brakes: 850: - Should my car have ABS?
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Old Apr 12th, 2021, 18:40   #7
JohnM 855 T5R
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Quote:
Originally Posted by RaelG View Post
I have no idea of it would make any difference but the previous owner fitted bigger front brakes as well as some Tesco value coilovers, is there any chance these are having an impact.
Bigger front brakes wont make any difference to ABS operation. As your ABS light is working and then goes out as it should after it self tests, it would indicate that your ABS is working fine. Pretty much any ABS fault would generate a fault code and cause your ABS dash light to remain on.

You said originally that you locked up under hard braking. With the relatively primitive ABS fitted to 850's and S/V/C 70's, lock up will always occur initially followed by the ABS then reducing brake line pressure in a pulsed manner - so brakes go on-off-on-off-on-off very rapidly which you would usually feel through the pedal and also hear from the tyres as the wheels lock up-free off-lock up-free off-lock up-free off. Are you sure that the ABS wasn't working? You will hear the tyres squealing and chirping whilst this happens.
Modern ABS systems are more sophisticated and modulate the braking in a more controlled and smooth way that is almost indiscernible. Maybe that is what you are used to.

Regards
John
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