My car's developed a strange shudder on idle. It happens about 80% of the time - so it's not always there. And it varies in strength - sometimes it's more noticeable that others. When it does shudder, it happens at 3-4 sec intervals. I've checked things like plugs and coils and had a quick look at the intake pipes, etc. I was fiddling about in the oil filter area a couple of weeks ago, is it possible I did something to the knock sensor?
Any help would be appreciated.
Thanks
Any help would be appreciated.
Thanks