found inside the glove box of the 78 Newport, has some kind of porcelain resistor?
What's this off of?
- Thread starter armyvet25
- Start date
is it the ballast for this car? and for size comparison, no bigger than a matchbox total size
hmmmm, same part number as the 70's ballast resistor
hmmmm, same part number as the 70's ballast resistor
SIPLOWGUY
Senior Member
Choke timer. Was common on carbureted cars laden with emission controls.
must have been part of the lean burn delete that was done
Vaanth
Active Member
The pictured item is the electric assist choke control. This one is the dual stage unit, with the visible resistor, Chrysler part number 4049777 or 4091034, and was used on 1977-1989 models with the divorced choke, except those using the single stage unit.
The resistor is a ceramic encased power resistor but is not the same as the ignition ballast resistor. The number seen in the picture, 23979, is the vendor number, not a part number.
The control is not part of the Electronic Lean Burn (ELB), Electronic Spark Control (ESC), nor Electronic Spark Advance (ESA) systems, but was used on the vehicles so equipped.
For more information about the choke assist control, refer to the following:
An electric assist choke was used on 1973 - 1989 Chrysler carbureted engines. The divorced choke style was used on these engines, except 1985 - 1989 Quadrajet equipped engines. The choke thermostat contains a heating element which is controlled by a control device powered by the Ignition Run circuit. The choke heater connects to one terminal on the device, and the other terminal is connected to the Ignition Run circuit, before the ballast resistor. 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 when it was redesigned with different internal control and external format.
The four styles of electric control units are listed in the following and shown in the following image (left to right):
- Chrysler 3656730, 3698357: 1973-1976 single stage.
- Chrysler 3755750, 3755770: 1974-1976 dual stage.
- Chrysler 4049799: 1977-1989 single stage.
- Chrysler 4049777, 4091034: 1977-1989 dual stage.
The controller is mounted on the intake manifold on small blocks or on the head on big block and slant six engines. The following image shows one mounted:
From 1973 through 1978, the control was directly connected to the Ignition Run circuit, and received power any time the ignition was on, whether the engine was running or not.
To prevent power from being applied to the choke when the engine is off, but the key switch for Ignition Run is on, Chrysler added an oil pressure switch in 1979 which cuts power when there is no oil pressure.
The 1979 - 1989 switch (Chrysler number 3231347, 3747431, 4186352) is a three terminal switch with one terminal connected to the dash oil light and the other two terminals in the circuit wiring to the choke control.
Last edited:
SIPLOWGUY
Senior Member
@armyvet25 PM sent
SIPLOWGUY
Senior Member
A BIG THANK YOU to @armyvet25
He was very gracious to send me the choke timer that he does not need. This is why this site is so awesome!
He was very gracious to send me the choke timer that he does not need. This is why this site is so awesome!
sold it for.....
Glad you could use it, I believe in passing on items I don't need to my fellow Mopar family
Glad you could use it, I believe in passing on items I don't need to my fellow Mopar family
SIPLOWGUY
Senior Member
I'm going to use it on one of the NYPD's museum cars. Thank you!
cool, i actually made a tribute Kenny Rogers Gambler 4 string cigar box guitar that ended up in a museum of music art history in NY
Similar threads
