Description
Product Overview
The iFJF Electric Choke Thermostat is a universal 12V replacement designed to restore reliable cold-start operation on Edelbrock, Holley, Carter, and Rochester carburetors. This thermostat replaces worn-out or failed choke elements with a modern electric design that heats up consistently — no more fussing with hot-air tubes or manual chokes.
Key Features
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Universal Fit — Fits Edelbrock Performer (1405, 1406), Holley 4150/4160/4500, Carter AFB, Rochester Quadrajet, and most aftermarket 4-barrel carburetors with electric choke.
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12V Electric Operation — Connects to any ignition-switched 12V source. Heats the bimetallic coil consistently — no dependence on exhaust manifold heat like factory hot-air chokes.
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Adjustable Tension — Rotate the housing to tune choke opening rate. Clockwise = leaner (opens faster), counter-clockwise = richer (stays closed longer). Dial it in for your engine and climate.
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Reliable Cold Starts — New bimetallic coil spring provides consistent tension. Proper fast-idle and choke operation from the first crank on cold mornings.
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Easy Conversion — Replaces factory hot-air or manual choke systems. Cap the old hot-air tube port and wire to key-on 12V. Done in 30 minutes.
Compatibility
| Carburetor |
Models |
| Edelbrock |
1405, 1406, 1407, 1408, 1409, 1410, 1411 (Performer Series) |
| Holley |
4150, 4160, 4500 (Universal & Street Series) |
| Carter |
AFB, AVS, Thermoquad |
| Rochester |
Quadrajet (Electric Choke Models) |
Specifications
| Spec |
Value |
| Brand |
iFJF |
| Voltage |
12V DC |
| Connection |
Single Wire (Positive) + Body Ground |
| Adjustment |
Rotational (±30°) |
| Mounting |
3-Screw Standard Pattern |
| Condition |
New |
Why Choose iFJF
A choke that doesn't work makes every cold start a battle. iFJF's electric choke thermostat eliminates the variables — no cracked hot-air tubes, no sticky linkage, no manual choke cable that freezes. Consistent electric heat means consistent choke operation. Whether you're daily driving a classic or building a weekend cruiser, reliable cold starts start here.
Installation Instructions
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Disconnect battery — Safety first.
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Remove old choke assembly — Three screws around the choke housing perimeter. On hot-air choke models, also disconnect the hot-air tube.
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Install new electric choke — Position the housing on the carburetor, ensuring the choke lever engages the bimetallic coil tang. Install three screws — do not overtighten.
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Wire to 12V ignition source — Connect the red wire to a key-on 12V source (ignition coil positive, fuse tap, or dedicated circuit). The housing grounds through the carburetor body.
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Adjust choke tension — With engine cold, rotate housing until choke butterfly just barely closes. Tighten screws. For colder climates, add slightly more tension (rotate counter-clockwise).
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Test — Start engine cold. Choke should set to high idle. As the electric coil heats up (2-5 minutes), choke should gradually open and idle should drop to normal.
Frequently Asked Questions
Q: What carburetors does this electric choke thermostat fit?
A: This thermostat fits Edelbrock 1400 series (1405, 1406, 1407, 1408, 1409, 1410, 1411), Holley 4150/4160/4500 series, Carter AFB, and most Rochester Quadrajet carburetors with an electric choke housing.
Q: How do I wire the electric choke?
A: Connect the positive wire (red) to a 12V ignition-switched source — typically the ignition coil positive terminal or a key-on fuse tap. The choke housing grounds through the carburetor body to the engine.
Q: What are symptoms of a bad choke thermostat?
A: Hard cold starts, engine won't stay running when cold, black exhaust smoke (running rich because choke stays closed), or no high-idle when cold (choke stays open).
Q: Does this replace the hot-air choke system?
A: Yes. This is an electric conversion that replaces the factory hot-air tube choke system. You'll need to cap the hot-air tube port on the intake manifold.
Q: Is this a direct bolt-on replacement?
A: Yes for most applications. The choke housing uses a standard 3-screw mounting pattern. Clockwise rotation leans the choke; counter-clockwise richens it. Adjust to your engine's needs.
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