Jim, A non working frequency valve will make little difference in the idle speed. If your idle has jumped to 5k RPM's your throttle plates must be stuck open. Temporarily disconnect the accelerator cable from the throttle spool and see if this corrects the problem. In order for the engine to operate efficiently throughout its entire range both the frequency valve and idle speed motor must be operational. "We're here to help you" DMC Help / De Lorean Services / <dmchelp@xxxx> Web Site: <www.deloreanservices.com>