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Idle Control Valve
By OE Match
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Idle Control Valve Hose
Maintain smooth engine performance and stable idle speed
with this OE Match Idle Control Valve Hose. Manufactured to the original factory
specification, this provides the correct fit, flexibility and sealing performance required for the
Bosch Motronic engine management system.
Fits:
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Diagram ref no 38
The idle control valve hose is a vital component of the engine's intake system, providing a sealed air passage between the idle control valve and the intake system. A damaged or leaking hose can introduce unmetered air, leading to poor idle quality, reduced drivability and engine management issues.
Ideal for routine maintenance, engine restoration or resolving vacuum leaks, this OE Match hose restores factory-style performance and reliability.
What Does the Idle Control Valve Hose Do?
The idle control valve hose forms part of the engine's idle air circuit.
Its primary functions include:
Carrying metered intake air to and from the idle control valve. Allowing the engine management system to regulate idle speed accurately. Maintaining a sealed intake system to prevent vacuum leaks. Supporting smooth cold starts and stable idle operation. Helping optimise fuel mixture and engine efficiency.A correctly sealed idle control valve hose is essential for consistent idle performance and proper operation of the Bosch Motronic fuel injection system.
Why Does the Idle Control Valve Hose Fail?
Located within the engine compartment, the hose is continuously exposed to heat, oil vapour and engine vibration.
Common causes of deterioration include:
Rubber hardening through repeated heat cycles. Cracks developing with age. Splits caused by engine movement and vibration. Oil contamination softening or degrading the rubber. Loss of flexibility leading to poor sealing. Perishing after decades of service.Even small cracks can create vacuum leaks that affect engine performance and idle quality.
When Should It Be Replaced?
Replacement is recommended when:
The engine idles unevenly or stalls. Idle speed fluctuates or hunts. Vacuum leaks are detected. The hose shows signs of cracking, splitting or hardening. Carrying out an intake system overhaul. Replacing the idle control valve or other intake hoses. Performing preventative maintenance on higher-mileage vehicles.Replacing ageing intake hoses is an effective way to restore smooth idle performance and eliminate hard-to-diagnose vacuum leaks
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011058902
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
Idle Control Valve Hose
Maintain smooth idle quality and reliable engine performance
with this OE Match Idle Control Valve Hose. Manufactured to the original factory
specification, this provides the correct fit, flexibility and sealing performance required for the
Bosch Motronic engine management system.
Fits:
Diagram ref no 34
This hose connects the idle control valve within the intake system, allowing accurately metered air to bypass the throttle butterfly during idle conditions. A secure, airtight connection is essential for stable engine idle, smooth cold starts and consistent throttle response.
Whether you're replacing ageing rubber hoses during routine servicing or carrying out a complete engine restoration, this OE Match hose helps restore factory performance and reliability.
What Does the Idle Control Valve Hose Do?
The idle control valve hose is a key part of the engine's air intake and idle control system.
Its functions include:
- Carrying metered air between the idle control valve and the intake system.
- Allowing the Bosch Motronic ECU to regulate engine idle speed accurately.
- Maintaining an airtight intake tract to prevent unmetered air entering the engine.
- Supporting smooth cold starting and warm idle operation.
- Helping optimise fuel mixture, emissions and overall drivability.
A properly sealed idle control valve hose is essential for maintaining the precise air-fuel balance required for stable engine operation.
Why Does the Idle Control Valve Hose Fail?
Over time, the hose is exposed to high engine bay temperatures, oil vapours and constant engine movement, causing the rubber to deteriorate.
Common causes of failure include:
- Heat-related hardening and loss of flexibility.
- Cracks and splits caused by age.
- Oil contamination weakening the rubber compound.
- Engine vibration causing fatigue around connection points.
- Perishing after years of service.
- Vacuum leaks developing through small surface cracks.
Even minor air leaks can upset the engine management system, resulting in poor idle quality and reduced performance.
When Should It Be Replaced?
Replacement is recommended when:
- The engine idles roughly or inconsistently.
- Idle speed hunts or fluctuates.
- Vacuum leaks are detected within the intake system.
- The hose becomes cracked, brittle or soft.
- The idle control valve is being replaced.
- Carrying out a full intake or engine overhaul.
- Performing preventative maintenance on older or higher-mileage vehicles.
Replacing ageing idle control hoses helps restore correct idle operation while preventing difficult-to-diagnose vacuum leaks.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93011066500
The product you are viewing cross references to these numbers
- Porsche 911 1984-1986 3.2L
- Porsche 911 1987-1989 3.2L G50
- Porsche 924S 2.5L 1986-87
- Porsche 924S 2.5L 1988
- Porsche 944 2.5L 8V 1982-87
- Porsche 944 Turbo 2.5L 8V 1985-88
- Porsche 944 Turbo 2.5L 8V 1989-91
- Porsche 944 Turbo S 2.5L 8V 1988
Fits:
Porsche 911 3.2 Carrera - 1984 to 1989
Porsche 944 2.5ltr - 1982 to 1987
Porsche 944 turbo - 1985 to 1991
Porsche 924S - 1986 to 1988
Diagram ref no 29
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
93060616100
The product you are viewing cross references to these numbers
OEMatch Idle Control Valve — Durability, Sealing, Performance
OEMatch provides a wide selection of Porsche parts, cataloguing over 4,000 part numbers and more than 8,700 OE cross-references to support repairs across Porsche generations. Idle control valves regulate airflow when the throttle is closed to maintain a steady idle and help prevent stalling during changes in load, temperature and electrical demand.
- Stable idle under changing loads and accessory use
- Improved cold-start smoothness and warm-up control
- Reduced risk of stalling during idle and deceleration
- Consistent idle response as the ECU adjusts airflow
- Carbon or oil deposits that restrict valve movement or passages
- Electrical faults in actuators, motors or connector terminals
- Air leaks in vacuum or intake hoses affecting idle regulation
- Contamination from degraded fuel, oil vapour or debris
- Age-related wear to moving parts and seals causing slow or inconsistent response
- Direct-fit replacements engineered to match original dimensions and tolerances
- Extensive catalogue and OE cross-references to aid correct selection for Porsche models
- Technical information and selection support from OEMatch to help confirm application
These items affect engine management and idle behaviour. Installation should be carried out by a qualified technician following model-specific procedures and torque settings. Use the correct connectors and seals, protect surrounding finishes during work and, where required, verify idle settings and ECU adaptations after fitting.
