1965 Fast Idle Speed Up

[amac4usc]

I have a 1965 Eldorado and I need help procuring a fast idle speed up control for a Carter carburetor part # 148 1203. Does anybody have one for sale or can point me in the right direction? I have looked all over google and eBay but cant find anything.

Thanks

["Cadillac Kid" Greg Surfas 15364]

Which side of the carb does the device sit?
Greg Surfas

[amac4usc]

Drivers side

["Cadillac Kid" Greg Surfas 15364]

Isn't there just a dashpot on that side contacting the throttle linkage so that it returns softly?
Greg Surfas

[amac4usc]

You might be right. It might be on the passenger rear of the carb. This is what I found in my master parts book. I have a Carter carburetor. 

[Cadman-iac]

You might be right. It might be on the passenger rear of the carb. This is what I found in my master parts book. I have a Carter carburetor. 

 I've looked at both of your pictures and I'm not seeing the part you are referring to.
 Is it vacuum operated or is it electrically operated? I've got a Carter carburetor from a 62, and if memory serves it's got an electric actuator on it with a long plunger/shaft that contacts the throttle linkage.
 I'd have to dig it out in order to get a picture of it, but if that's not what you're looking for I won't bother.

 Rick

["Cadillac Kid" Greg Surfas 15364]

The idle speed up actuator is intended to speed up the idle when the car is in Neutral or pak and the AC is on. Although the FSM does not say this, I believe it was intended for Limos used in Livery service and Hearses.
That said, my 66 did not have that device nor was there any sign that it ever did have it. Check the vacuum lines on the Power servo. If you car was intended to have this device there will be a blue vacuum line from #9 on the 9 port vacuum valve.
Greg Surfas

[Cadman-iac]

  Greg,
Did that only activate in park or neutral, or drive and reverse because of the additional engine load from the transmission being engaged?
I thought because there isn't any load in park or neutral, there isn't a need to kick up the idle. Or was the thinking that if in gear, the accelerator was going to be applied and the additional activation was not required?
But I may have that backwards too.
Thanks, Rick

["Cadillac Kid" Greg Surfas 15364]

Rick,
The idle speed up was engaged ONLY in Park and Neutral.  I believe that the idea was that those commercial cars would spend a lot of time idling and even though the idle would naturally increase when out of drive, an even faster idle was necessary to both keep the Air Conditioning system providing more cooling (only would provide less than 20% cooling at idle) and have the radiator fan force more air through the radiator to keep the engine cool.
Greg Surfas

[Cadman-iac]

 That makes perfect sense. Not having any experience with a limo, I hadn't thought about that. Thanks for the clarification.

 Rick

[Joe G 12138]

    Here's a couple pictures of the Air conditioned car (all series) vacuum operated idle kick up on a "65. This car has the Carter AFB carb. The part is located on the passenger side rear of the carb. The Rochesters had a similar setup; it may have been mounted on the driver side. I'm not sure; don't have any around anymore. These base idle on these carbs was primarily set up by the idle air mix screw and vacuum measurements. With an increased air conditioner load it was desired to bump up the idle to keep smooth and not stall. With the air conditioner on, the idle speed is bumped up by the device. Off idle; the car doesn't need to know or care.
     There is a dashpot also on the drivers side as someone suggested, but that is just to soften up the de accelleration action on both a/c and non a/c cars.
      Hope this helps you find what your looking for.  Joe G