Originally Posted by
Jonny Wilkinson
You don't need to remove the rod, just check for it sucking air through the seal when the plenum has vacuum e.g. at idle.
sxbaz is talking about the pipework between the filter and the AFM. If it is too straight or too short, the AFM can end up reading air in both directions which messes with the ECU's head.
regarding breather set up...I'm assuming you have the left most pipe connected to the PCV :wack: and what the feck is that big old brass thing connecting the right most pipe to the elephant's trunk ?
If that is a one-way valve, that might be causing some of your troubles.