Throttle Return Spring. Porsche 911 1970-83

Throttle Return Spring.
The Porsche Throttle Return Spring is a genuine OEM component designed to ensure reliable throttle response and safe operation. Installed in the throttle linkage assembly, this spring provides the tension needed to return the throttle plate to the closed position whenever the accelerator is released.

Fits:

• Porsche 911 1968-1973 2.2L / 2.4L / 2.7L RS LWB (F)
• Porsche 911 1974-1977 2.7L / 1976-77 3.0 Carrera
• Porsche 911 1978-1983 3.0L / SC

What This Product Does:

• The Throttle Return Spring provides the force that pulls the throttle (or control linkage) back to its idle / closed position when the accelerator is released.
• In a fuel injection or mixture control setup, such a spring keeps tension on the throttle and ensures the throttle plate or mixture valve returns reliably, preventing it from staying open or partially open.
• It helps maintain consistent throttle behavior, ensures smooth transitions off-throttle, and prevents unwanted throttle creep.

Symptoms Of A Worn / Broken Return Spring:

• The throttle may not return fully: the engine feels like it wants to hold higher RPM or won’t settle at idle.
• Delayed or sluggish engine deceleration when releasing the accelerator.
• Inconsistent or unstable idle, perhaps with the throttle slightly open.
• A “creep” effect — the engine seems to maintain higher revs when it should drop.
• Visible damage to the spring (stretched, corroded, weakened) or the spring detached from its linkage.

Why Replacement Matters:

• Ensures safe, predictable throttle behavior — a faulty return spring can lead to unsafe throttle response or lag in returning to idle.
  
• Prevents throttle slop or hang — keeping the linkage under correct tension improves drivability and control.
  
• Protects against accelerator-related faults — if the throttle doesn’t retract cleanly, it may stress other linkage parts or cause erratic engine behavior.
  
• It’s a relatively inexpensive part that can avoid more severe problems with the throttle / injection linkage over time.

Diagram Ref No 38

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

91111016502

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