Microswitch for intake manifold. Porsche 911 with MFI Mechanical Fuel Injection  ❭  90161310600

Microswitch for intake manifold. 
OE Match intake manifold microswitch engineered as a direct-fit replacement for the original Porsche factory microswitch used on Porsche 911 engines equipped with MFI (Mechanical Fuel Injection). Located on the intake manifold, below the throttle linkage. It detects specific intake airflow/position conditions and feeds that signal to the engine management/mechanical fuel injection system.

Fits:
Porsche 911 1969 - 1973
with MFI Mechanical Fuel Injection

Diagram ref no 24

This replacement is designed to operate reliably under high heat and vibration typical of the intake manifold area. It installs directly into the intake manifold or associated linkage mounting point using factory mounting hardware - no modification needed.

This OE Match microswitch is ideal when the original microswitch has worn, failed, or exhibits intermittent electrical contact, helping restore consistent fuel metering and smooth engine response.

The intake manifold microswitch detects the position or movement of a mechanical linkage (such as throttle or airflow sensor plate) and sends a contact signal to the engine’s mechanical fuel injection system. This information helps the MFI system manage fuel delivery and idle characteristics accurately.

Microswitches in mechanical fuel injection systems wear over time, leading to poor electrical contact, intermittent signals, or failed switch actuation. A compromised switch can result in rough idle, hesitation, inconsistent throttle response, or fuel metering issues. Installing an OE Match microswitch restores the correct mechanical-to-electrical signal interface, helping maintain MFI performance and drivability.

When to replace:
• Engine exhibits rough or unstable idle with MFI system
• Throttle response feels inconsistent
• Original switch shows poor contact or intermittent operation
• During intake manifold service or MFI system overhaul
• Preventive maintenance on high-mile MFI cars

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90161310600

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