Help needed identifying part.

[Plumcrazy4me]

Need help identifying a part found while going through boxes of a long ago disassembled 70 Challenger R/T. May not even be E-body. Thanks group!

 

[pschlosser]

That looks like a ballast resister. Maybe for a slant-6, I have the least experience with those.

 

[Vaanth]

Need help identifying a part found while going through boxes of a long ago disassembled 70 Challenger R/T. May not even be E-body. Thanks group!

View attachment 144928

View attachment 144929

The pictured item is a dual stage control for the electric assist choke on 1977 - 1984 Chrysler engines, part number 4049777 or 4091034. The choke heater connects to one terminal on the device, and the other is connected to the Ignition Run circuit, before the ballast resistor (typically the blue wire on passenger cars). The control is mounted on the intake manifold on small blocks or on the head on big block and slant six engines.

Below ~58 degrees Fahrenheit the dual stage control applies partial power to the choke heater element. Above ~68 degrees Fahrenheit, it applies full power to the element. At ~130 degrees Fahrenheit it turns off power to the element. This provides for a slower choke opening in colder temperatures, and faster opening in warmer temperatures, and no electric heat at the choke during a restart when the engine is already warmed up.

A dual stage and single stage, with a lesser degree of control, was used, depending on the application. An earlier version of both dual and single stage was used 1973 - 1976.

The four styles of electric control units are listed in the following and shown in the following image:

• Chrysler 3656730, 3698357: 1973-1976 single stage.
• Chrysler 3755750, 3755770: 1974-1976 dual stage.
• Chrysler 4049799: 1977-1984 single stage.
• Chrysler 4049777, 4091034: 1977-1984 dual stage.

This can be used on other applications for electrically heated choke control. I use a 1973 dual stage unit on a 1967 GTX with a later Thermo-Quad on a 1978 intake manifold with a factory style divorced electric assisted choke assembly.

 

[Plumcrazy4me]

Perfect! Thanks for the info and pictures.