Thanks for the advice, Tom. Following you're steps here's what I find... 1. When cold I find the car won't start without a little bit of gas; it just turns over, almost catches but then stops. 2. I can't see any obvious air leaks; I will have a more thorough check later this week. 3. I have disconnected the battery for a bit so hopefully the ecu has reset ( any ideas how long this takes, i.e. is it pretty much instant or does it need no power for several minutes?). 4. I will disconnect the lambda sensor when i go out next and see if there's any difference in behaviour. I thought this only had an impact once the engine is hot, so shouldn't be an issue at start up? On the the lambda sensor, how should this show up on easimap? I have to added it to my 'dashboard' but it always shows an error. Not sure if this is a real error, or because I have the wrong config file, or the ecu doesn't share this info? I also get an 'unknown error' coming from the ecu at all times, again I am not sure if this just because the ecu is locked or if it is a genuine issue. By hunting, I mean the revs oscillate once the throttle is released, usually dropping down to a level where the engine almost stalls before recovering a bit and 'bouncing' around for a few seconds. This can cause 'kangarooing' if changing down, which is fun...more of a problem is when edging out of a junction, it is very easy to stall, usually at just the wrong moment! Finally, is anyone able to provide a bit more detail on the correct setting for the throttle pot for the 310, and a bit more info on how to adjust it? As you can probably tell I am quite new to all this, so please assume I know nothing! Cheers,