I'm just trying to cross things off the list for what might he causing my engine to ever so slightly hunt on idling. It isn't much, and no where near to the point of stalling, but I don't like it. I've had a look at the maf, and that looks nice and clean. Ive cleaned out the iac as that had a dusting of carbon on it. I'm gonna look at the plugs next and while the manifold is off/lifted replace the Pcv valve, as I've read that they should be changed every 2 years or do. The outer foam part of the hose at the valve end looks a bit worn, and they was a small pool of oily crud at the manifold end. Any advice on where to source a new pipe and valve from as Google has failed me so far?


2004 Series 1 Roadster