Chris and Liza Member 42 Member For: 17y 10m 24d Gender: Male Location: Sydney, New South Wales, Australia Posted 27/08/10 02:41 AM 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
ebxmple Member 1,322 Member For: 18y 7m 23d Posted 27/08/10 03:41 AM 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.
boost69 Legacy Donating Member 737 Member For: 21y 4m 4d Posted 27/08/10 04:43 AM 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...
Chris and Liza Member 42 Member For: 17y 10m 24d Gender: Male Location: Sydney, New South Wales, Australia Posted 29/08/10 07:10 AM Author 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...
Chris and Liza Member 42 Member For: 17y 10m 24d Gender: Male Location: Sydney, New South Wales, Australia Posted 30/08/10 07:57 AM Author 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.
yz250 Member 3 Member For: 17y 3m 5d Posted 03/09/10 02:19 PM 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
smicky Go Pies!!! Legacy Donating Member 2,852 Member For: 18y 7m 6d Gender: Male Location: Vic Somewhere - Sometimes NSW Posted 03/09/10 02:47 PM 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
SuckSqueezeBangBlow ʎǝʞuoɯ ɹoıuǝs Legacy Donating Member 1,808 Member For: 17y 9m 7d Gender: Male Posted 03/09/10 09:39 PM Posted 03/09/10 09:39 PM the manual which comes with the car explains this noise as the ABS selftest.
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