It sounds to me like your Lambda system just died. Troubleshoot to find the reason (very common for the relay to die). Since the Lambda wasn't adding fuel you compensated by going overly rich with the mixture screw. You should hear the frequency valve buzz whenever the engine is running. You are almost there, get the Lambda running again and it sounds to me like you have it just about right! (Of course readjust the mixture screw with the Lambda running). David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "Rustproof" <Rustproof@xxxx> wrote: > Having taken all the advice I could get from the list and the archives, I > have attempted to set up both the CO mixture as well as the CIS idle. This > was fiddled with by the previous owner and never properly reset. I