Gary - you are right Megasquirt cannot control the revs but once the car is out of the warm up cycle dependent on where you set the ego kick in (mine is 900rpm) and how much control you give the MS to control mix (mine is 20%) the MS will control the injector on off timing to comply with your VE table and where the TPS position. So even though I am still running rich my revs could be running some factor of 15% below where they might be as the MS compensates. I also have an electrically operated AAV on this car and have it locked all of the way down at the moment. One of my other other 450's (this one is the 350 euro M116) is a US spec M117 and I have the MS1 but with the fast idle board so it controls and electric AAV for me and that will control revs particularly during the cold start phase to hold the engine at a specified warm up rpm. Maybe this will be the kick I need to complete the MS2 board i have and get the EDIS installed
although I still think this is a mechanical problem
Graham - haven't talked to you for ages - busy at work. I will check the dist and maybe pull it and do a visual check as well when i am checking the valves and chain again - could be the reason as i am seeing a lot of wobble in the timing above 2000 rpm. my car sounds like yours
I have an afr and pressure gauge on the dash where the ashtray was and a vacuum gauge in a pod next to the console. The pressure gauge was one of the first - I like to make sure I haven't burst a pipe and am not spraying petrol all over the hot engine whilst sitting in the car wondering what the smell is and why the car isnt performing properly
I'll get her into the shop tonight and start playing
cheers
barri