Fast idle/cold advance switch

[ludite]

Greetings,
I've got an 84 F250 and it seems the temperature switch that controls the high idle/cold advance circuit is shot, it has continuity when cold but really high resistance. I like the idea of having the high idle on a switch in the cab anyways so was considering bypassing the temp switch all together. If I just plug a switch in where the probe used to be that's obviously the easiest but that means that the cold advance will activate anytime I want a fast idle which sometimes will be with the engine at operating temperature, can anyone tell me if that's a bad idea? If it is I will wire the two functions separately.

 

[IDIBRONCO]

I don't think that it will hurt anything as long as you don't drive around with that switch on.

 

[Rdnck84_03]

Greetings,
I've got an 84 F250 and it seems the temperature switch that controls the high idle/cold advance circuit is shot, it has continuity when cold but really high resistance. I like the idea of having the high idle on a switch in the cab anyways so was considering bypassing the temp switch all together. If I just plug a switch in where the probe used to be that's obviously the easiest but that means that the cold advance will activate anytime I want a fast idle which sometimes will be with the engine at operating temperature, can anyone tell me if that's a bad idea? If it is I will wire the two functions separately.

I wired mine independently on switches. Only time I use the cold advance is when the temps are down below 15-20 degrees.

James

 

[ludite]

Thanks for the responses. I think I might as well be able to switch them separately if for no other reason than for something to play with.

 

[SIKPUP]

High idle manual override

 

[ludite]

Thanks for that, I'll give it a read through

 

[Cant Write]

My temperature switch functions just fine but my solenoid has released the ghost.

Does anyone have a source for the solenoid?

Or does anyone just use a block of wood to idle it up

 

[Rdnck84_03]

@Cant Write I have heard that they are NLA, I don't know for sure as both of mine are good.

James

 

[IDIBRONCO]

Does anyone have a source for the solenoid?

I have heard that they are NLA

They must be NLA since there's a few on Ebay going for $90-$100.

 

[Rdnck84_03]

They must be NLA since there's a few on Ebay going for $90-$100.

Kinda makes me wish I hadn't thrown all the one's away from the 80's ford carburetors over the years.

 

[IDIBRONCO]

I don't know how they compare, but there's several of them for different carburetors listed too.

 

[Rdnck84_03]

I'm sure with a little fabrication im sure they could have been adapted.

James

 

[Cant Write]

They must be NLA since there's a few on Ebay going for $90-$100.

I saw that and my jaw dropped!!!

My jaw usually only drops for that Bare of mine

Wait a moment.... @Old Goat ....where did you find the “twins” emoji thingy!!!??!

 

[Nero]

They also exist over at CDD

7.3/6.9 IDI High Idle Solenoid Assembly

Tested good condition high idle solenoid, no longer available new.

classicdieseldesigns.com

 

[Cant Write]

They also exist over at CDD

7.3/6.9 IDI High Idle Solenoid Assembly

Tested good condition high idle solenoid, no longer available new.

classicdieseldesigns.com

Thanks for that!!! I also need a return line kit so that helps solve things!!