Re: lambda sensor switch

[jtrealty@xxxx]

The temp sensor you are referring to tells the lambda computer that 
the engine has warmed up and can now trust the 02 sensor. It will then 
modulate the fequency valve. To test the temp sensor remove it, hook 
up a continuity tester, and heat the sensor in some water. At some 
point before 212 it should change state. If it does not then you can 
assume it is defective. You cannot tell by ear what the frequency 
valve is doing execpt that is doing something. To see what is going on 
hook up a dwell meter to the diagnostic plug.
David Teitelbaum
vin 10757


--- In dmcnews@xxxx, Delorean17@xxxx wrote:
> Hello List,
> When I purchased my car the ground wire to the lambda 
switch(switch 
> located on cooling manifold) was disconnected. When I hook up the 
ground 
> wire like it should be the frequency valve starts up and will not 
stop, even 
> when the engine is hot. would this indicate a bad lambda sensor 
switch? 
> what else should I look at? I have the whole intake off now so I 
would like 
> to change the switch now if it is the problem.
> 
> Thanks
> David