michelinman
New Member
This is another ongoing question to find this bloody annoying sound in my 2010 SV6 SIDI, hence the question yesterday on extracters and convertors.Ive lost count how many times my car has been in the dealers looking for this light knocking. The trans and torque convertor have been checked ok but the noise is still there even under very light throttle. It comes in at about 1600 rpm and continues up to 2000 rpm and as the engine gets hotter the rev range climbs by 200 to 300 revs and is a little quieter. Now a retired mechanic friend has suggested that it may be the catalytic convertors. I have read heaps of data on them like how they can effect fuel economy and break down and rattle while driving. My fuel economy isnt that good from what Ive read that it should be. Has anyone got the same problem out there? I would like to find out. Thanks.