Re: need frequency valve help

["Robert Rooney" <dmcvegas@xxxx>]

If you need to replace the plug for the frequency valve, then you can 
cut off the plug from a Volvo from a junkyard and use it. If I 
remember correctly the frequency valve is only supposed to buzz when 
the engine is running. I'm at work right now, so I don't have my 
manuals with me. But check the power supply to the LAMBDA module (I 
think there's 2). I could be that somewhere down the line power is 
either not making it to the module itself, or perhaps the LAMBDA 
relay, or even something else. I don't get home untill late this 
evening, but I'll take a look at the wiring diagram to see if I can 
find out some points for you to check. Off hand the only thing I can 
think of would be to remove the LAMBDA relay (top row, 2nd from the 
right) and check that all contacts are clean, and that the female 
contacts in the socket are at the top are making contact. Also check 
the RPM relay as well and do the same for it.

-Robert
vin 6585



--- In dmcnews@xxxxxxxxxxx, "Walter" <Whalt@xxxx> wrote:
> Robert, thank you very much for your help! :)
> 
> To Robert & everyone else:
> 
> Is the frequency valve supposed to buzz when the ignition is 
switched on?
> Or does it only buzz while the engine is running?
>