GM 7043684 – Idle Needle Limiter – Delco – Group 3.823 – NOS Carburetor Emissions Hardware

Description:

GM 7043684 – Idle Needle Limiter – Delco – Group 3.823 – NOS Carburetor Emissions Hardware

Description: Genuine GM/Delco 7043684 Idle Needle 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 2‑bbl and 4‑bbl carburetors.

SOLD AS INDIVIDUAL UNITS - TWO / BAG - IF U WANT THE SEALED BAG - BUY TWO - OTHERWISE THE BAG WILL BE OPENED AND ONLY ONE LIMITER SENT WITHOUT THE BAG.

Details:

• GM Part Number: 7043684

• Group Number: 3.823

• Description: Idle Needle Limiter

• Manufacturer: Delco (GM)

• Condition: NOS in original packaging

• Applications: Rochester carburetors on 1970s–1980s GM vehicles

• Status: Discontinued OEM part

• Because the part is an idle‑mixture limiter, and because:

  • It is Delco

  • It is in Group 3.823

  • It is a 704xxxx part number (1970s–1980s GM carburetor numbering block)

  …it fits GM vehicles equipped with emissions‑era Rochester carburetors (2GC, 2GV, Monojet, Quadrajet, E4ME, etc.) where idle‑mixture screws were restricted by federal regulation.

  Fitment Framework (Accurate Structure, Ready for Exact MPC Data)

  Year	Make	Model	Engine	Carburetor	Notes
  1970s–1980s	Chevrolet	Various	V6 / V8	Rochester 2‑bbl / 4‑bbl	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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