Sounds to me like your new RPM relay is defective. It powers the lambda relay as well as the fuel pump. The fuel accumulator will make up for short term drops in pump pressure but why touch the mixture screw? First rule of any DIY mechanics - if something goes wrong - what did I do last? I hope you put it back to where it was otherwise you'll have trouble startting from cold now. When the engine is hot and the lambda system is working properly, adjusting the mixture screw should cause the frequency valve to change in note. if it doesn't and pressing the full throttle switch doesn't either, you probably have a worn out lambda sensor Martin rickmichaels wrote: >I have installed all new relays in my car after trying to >unsuccessfully replace the 555 timer in the original RPM relay. Now >when my car runs the RPM and Lamda relays click constantly about every >second. The car seems to run and idle fine but I know this clicking >isn't right. When I checked the engine for anything unusual I can >hear what I believe is the frequency valve sounding a constant >buzzing. I tried adjusting the fuel mixture screw but that didn't >seem to make any difference. Does anyone have any ideas on what might >be wrong? > >Thanks, > >Rick >00802 > > > To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/