well no miracle cure yet. old fuel filter was fairly clean. new filter connected up, car has the same problem. went for adjusting the AFM air bypass screw, only to find it is wound all the way in already (closed), adjusting it back the other way (opening it) just makes the car run even worse on idle. no choice now but to take the car in next week and plug in exhaust gas analyser and o2 sensor, to find out what the heck is going on at idle. I'm starting to suspect the afm may have gone bad, so will swap in another next week to see what happens. it's a shame they never provided a piggy back wire or connector on the ECU, so that you could measure the voltages going into the ecu, to determine the cause of over/under fuelling.
noticed in very hot weather the other day, during irregular idle, there was a small knock coming from the right hand cam bank too, its never done that before! doesn't do it unless its very hot. I think we will check the cam timming again too!!
![Confused :?](./images/smilies/icon_confused.gif)