--- In DMCForum@xxxxxxxxxxxxxxx, "Cohee, Michael" <mcohee@xxxx> wrote: > should the frequency valve buzz non-stop > when the engine is running? Yes, it should buzz continuously. It buzzes at a frequency of 70Hz and to let more fuel through the "Duty Cycle" is changed. The duty cycle is the amount of time the valve is open per cycle; one cycle consists of one opening and one closing of the valve. If I remember correctly there's quite a good explanation on how the frequency valve works in the Workshop Manual... I can look up the exact pages tonight if you want. Good luck, Jan van de Wouw Thinking Different... Using a Mac... Living the Dream... Driving a DeLorean... DMC-12 "Dagger" since Sep. 2000 100NX "Saphire" since Nov. 2002 -------------------------------- PS. if the valve is nog functioning properly (staying closed) the car is running too lean at those times, causing your erratic idle. Most likely culprit is the lambda computer or its sensors if you ask me; if it was the RPM-relay you'd loose fuel pressure from the tank too. Yahoo! Groups Sponsor <http://rd.yahoo.com/M=247865.3355058.4641699.1512248/D=egroupweb/S=170512 6215:HM/A=1482387/R=0/*http://ads.x10.com/?bHlhaG9vaG0xLmRhd=1054132740%3e M=247865.3355058.4641699.1512248/D=egroupweb/S=1705126215:HM/A=1482387/R=1 =1054132740%3eM=247865.3355058.4641699.1512248/D=egroupweb/S=1705126215:HM /A=1482387/R=2> <http://us.adserver.yahoo.com/l?M=247865.3355058.4641699.1512248/D=egroupm ail/S=:HM/A=1482387/rand=757604206> To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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