I assume you are referring to the RPM relay as far as pulses are concerened.The relay should not pulse. It receives pulses. If it doesn't receive them or if they are not often enough the relay is supposed to drop out and shut down the fuel pump. If it did pulse the fuel pump would start and stop. As for the Lambda relay it shouldn't pulse either or the frequency valve would stop buzzing when it did and under normal running conditions it should buzz all the time the motor is running. IMHO the clicking that the owner is hearing may be one of the circuit breakers, most likely the cooling fan breaker. He says the frequency valve does not stop buzzing so he can't be hearing the Lambda relay clicking (assuming his wiring is stock of course). I have found the most and the worst modifacations are usually done to the wiring system of a used car. I can only offer advice based on a stock configuration. Any mods and all bets are off. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "John Hervey" <john@...> wrote: > > David, wouldn't it be clicking on and off as the pulse is fluxuating from > the pulse coil. > John Hervey > > > -----Original Message----- > 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/