Sad Not Closing

[Dan Ingram 1]

I've spent most of today trying to get my car to idle properly. Its idleing to fast I think due to the sad not closing. Is it possible to blank of the pipe going from the sad to the bottom of the inlet manifold?? will I have problems if I do??

 

If you cant do that is there any way of fixing the sad or do I just have to replace it???

 

 

Thanks in advance

 

Dan

[tom_m 0]

you'll have shocking cold starts if you do, not the best fwith winter just around the corner.

 

are you sure its the sad, have you tried pinching the pipe to the sad will its racing to see if the revs drop?

 

a quick search should bring up various other things to try/work arounds/ solutions.

[Dan Ingram 1]

Yes it is definately the SAD. Its permanently open. If I blank the pipe of the goes from the SAD to the inlet manifold it idles perfectly. I just have no idea how to fix the SAD so that it closes.

[Rob_the_Sparky 9]

FYI:

 

The SAD is a stupidly simple device based on a bi-metallic strip. Basically get it hot and it closes. The heat comes from an electrical heater powered from the tachy relay, this turns on the juice with the ignition slowly closing the SAD as it warms up.

 

If it isn't closing either the SAD is stuck/buggered or there electrical supply to it is bust.

 

Rob

[Dan Ingram 1]

What sort of voltage should there be going to it then??? Ill test that and if thats right then I think i'll just stick another one on.

[Rob_the_Sparky 9]

Just 12V off the battery AFAIK, measure it with the connector taken off. Most likely to be the SAD itself.

[mossy 0]

Just a quicky the SAD should get a supply of around 9v from the tachy relay via the ECU according to Cardata.

 

Al