Had another post titled "1990 560 SEC ABS, High Idle, Cold Start Problem". With everyones help have solved the ABS and cold start problems. Still having a high idle problem but the conditions have changed. Previous post: "... idle speed is inconsistent. Sometimes the idle speed is normal, i.e., less than 1000 rpm, and sometimes will not go below 1500 to 1800 rpm's (hot or cold makes no difference) just inconsistant idle speed." Now: Idle speed still inconsistent. However, does not go into "high idle" as often, nor idle at as high of a RPM as before (1200 now vice 1500 to 1800 as before). But, only when in Park. If shift to Reverse or Drive RPMs drop to 750. Before, when in "high idle" mode, even when in Reverse or Drive, idle remained high. Any suggestions? Thanks Bob