16-09-2019, 07:39 AM (This post was last modified: 16-09-2019, 07:41 AM by ffrenchie.)
It's in the pipe from the air filter to the inlet manifold, plastic tube with a connector running to it. I've never had any luck cleaning one once it's gone wrong but you can get one on ebay for £25. If it's faulty disconnecting it will improve running straight away.