Klaus, As I said in an earlier post. Adjust the air flow with the 3mm allen wrench. This will stop it from seeking and level out the idle. Again: It should be done with an exhause analyzer. John Hervey www.specialTauto.com --- In dmcnews@xxxx, klaus.steiner@xxxx wrote: > Hi group, > > Following problem occurs: > My engine idles between 500 an 1000 rpm when warm, idle speed > microswitch works. When I press the full throttle enrichment microswitch > the frequency valve changes noise and the engine idles at 1000 rpm. Any > suggestions? > > Klaus Steiner > #05980 Germany > www.steinerklaus.de