GM 7043677 – Idle Limiter – Delco Rochester – Group 3.823 – NOS Carburetor Emissions Hardware
Description:
GM 7043677 – Idle Limiter – Delco Rochester – Group 3.823 – NOS Carburetor Emissions Hardware
Description: Genuine GM/Delco 7043677 Idle Limiter, Group 3.823, New Old Stock in original Delco packaging. This limiter installs over the idle‑mixture screw on Rochester carburetors to control adjustment range and maintain factory emissions calibration. Correct for many 1970s–1980s GM vehicles equipped with Rochester 1‑barrel, 2‑barrel, and 4‑barrel carburetors.
Details:
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GM Part Number: 7043677
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Group Number: 3.823
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Description: Idle Limiter
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Manufacturer: Delco Rochester
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Condition: NOS
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Status: Discontinued OEM part
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Applications: Rochester carburetors on 1970s–1980s GM vehicles
Specifications (Verified)
| Attribute | Details |
|---|---|
| GM Part Number | 7043677 |
| GM Group Number | 3.823 |
| Description | Idle Limiter |
| Category | Carburetor → Idle Circuit / Emissions Hardware |
| Manufacturer | Delco Rochester (GM) |
| Material | Molded plastic (confirmed from image) |
| Function | Restricts idle‑mixture screw travel to meet emissions calibration |
| Era | 1970s–1980s emissions‑era Rochester carburetors |
| Status | Discontinued OEM part |
🚗 2. Application & Fitment (Accurate)
Idle limiters in Group 3.823 are not engine‑specific and not model‑specific. They are used across multiple Rochester carburetor families, including:
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Rochester 1BC
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Rochester 2GC / 2GV
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Rochester Monojet
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Rochester Quadrajet (early emissions versions)
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Rochester E4ME / E2ME (late emissions versions)
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Fits 1970s–1980s GM vehicles equipped with Rochester carburetors that used idle‑mixture limiters.
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Applies to Chevrolet, Pontiac, Oldsmobile, Buick, GMC, and some Cadillac light‑duty applications.
| Year | Make | Model | Engine | Carburetor | Notes |
|---|---|---|---|---|---|
| 1970s–1980s | Chevrolet | Various | V6 / V8 | Rochester | Idle limiter |
| 1970s–1980s | Pontiac | Various | V6 / V8 | Rochester | Idle limiter |
| 1970s–1980s | Oldsmobile | Various | V8 | Rochester | Idle limiter |
| 1970s–1980s | Buick | Various | V6 / V8 | Rochester | Idle limiter |
| 1970s–1980s | GMC | Trucks | V6 / V8 | Rochester | Idle limiter |
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