Chris and Liza Member 42 Member For: 15y 5m 30d Gender: Male Location: Sydney, New South Wales, Australia Posted 27/08/10 02:41 AM Share Posted 27/08/10 02:41 AM G'day everyoneSince I have owned my T it experiences a knocking sound after startup.Series of events:Startup, drive to almost exactly 10km/h (every time), then it goes knocka-knocka-knocka-knocka-knocka and then no more noise until next startup.Braking performance is normal. I was told that it was the abs unit - because the discs and pads were worn out - but after I fitted new discs and pads the noise came back. I got one start and take off without any noise - woohoo!Any ideas guys?Cheers,Chris Link to comment Share on other sites More sharing options...
ebxmple Member 1,322 Member For: 16y 2m 29d Posted 27/08/10 03:41 AM Share Posted 27/08/10 03:41 AM that's just the abs system doing a selftest mate,that's why it does it after each cycle of the key. Nothing to worry about at all. Link to comment Share on other sites More sharing options...
boost69 Donating Members 737 Member For: 18y 11m 10d Posted 27/08/10 04:43 AM Share Posted 27/08/10 04:43 AM Mine does the same...you start it...then put it in drive and about 5 seconds later you hear that knocking noise for about 3 seconds and then nothing everything is normal...mine does this without fail every time...I have always wondered wether this is normal... Link to comment Share on other sites More sharing options...
Chris and Liza Member 42 Member For: 15y 5m 30d Gender: Male Location: Sydney, New South Wales, Australia Posted 29/08/10 07:10 AM Author Share Posted 29/08/10 07:10 AM hmm fair enough - I just thought it was a bit unusual that a near new car would make such a noise... Link to comment Share on other sites More sharing options...
Chris and Liza Member 42 Member For: 15y 5m 30d Gender: Male Location: Sydney, New South Wales, Australia Posted 30/08/10 07:57 AM Author Share Posted 30/08/10 07:57 AM here's a possibility - when I was dismantling my front end (for some nice new nolathane bushes to go in) - I noticed that the brake line coming through the bodywork on the passengers side had chopped through its grommet. I'll fix this and see if it fixes the problem once I get the front end back together. Link to comment Share on other sites More sharing options...
yz250 Member 3 Member For: 14y 10m 10d Posted 03/09/10 02:19 PM Share Posted 03/09/10 02:19 PM Hey Mate, the noise you describe is definitely the ABS carrying out a self test. My old Ba, the current Bf2 and the old mans Fg all go through the same sequence.Cheers Link to comment Share on other sites More sharing options...
smicky Go Pies!!! Donating Members 2,852 Member For: 16y 2m 12d Gender: Male Location: Vic Somewhere - Sometimes NSW Posted 03/09/10 02:47 PM Share Posted 03/09/10 02:47 PM (edited) ABS self test..Next service just get them to check the sensors are ok... I had one a bit flakey on the startup test thingy... but once the car had moved and hit the brakes it was fine... Dealers wasnt sure why the 'test' wasnt 100% but the ABS sensor and rest of the system was fine!They just replaced it anyays.. Edited 03/09/10 02:48 PM by smicky Link to comment Share on other sites More sharing options...
SuckSqueezeBangBlow ʎǝʞuoɯ ɹoıuǝs Donating Members 1,808 Member For: 15y 4m 12d Gender: Male Posted 03/09/10 09:39 PM Share Posted 03/09/10 09:39 PM the manual which comes with the car explains this noise as the ABS selftest. Link to comment Share on other sites More sharing options...
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