I am still having to run my car in open loop. The problem I had causing poor idle and engine stumbling and eventual stall is still there. If I leave it in closed loop by connecting the EHA(which came with the airhorn assembly) the engine will run worse and worse until it dies. All I can hope for at this time will be to get the basic mixture set and then try to track my intermittant electrical failure. But to almost double the fuel mileage has got to be a step towards the final goal, which is to make this thing run like a Mercedes! I still have hope!!