The air supply is like breathing for the engine and is crucially important, otherwise combustion cannot take place. In this product group you will find everything related to the air supply for the combustion engine, from throttle housing to an air mass sensor. For turbochargers and intercoolers, we refer you to the separate pages. If you have any questions or would like advice, please contact our product specialists. They will be happy to assist you.
Here you can find the right air suction hose for your vehicle. The air suction hose conducts the air into the intake manifold and thus into the engine block. Due to ageing, these hoses can tear, causing leakage. If this concerns an air suction hose after the air mass sensor, this can cause the engine to run irregularly, possibly resulting in an engine malfunction indicator light. This can then be accompanied by increased fuel consumption. If you cannot find the leak, it is advisable to carry out a leakage test in order to detect the source of the leakage in the intake section.
Some intake manifolds are equipped with swirl valves to control/adjust the air flow. These swirl valves are controlled by an electronic adjustment element, an actuator. If this actuator is defective it will be accompanied by an engine malfunction indicator light. In some cases, the actuator itself may not be defective but cannot function over its full range due to internal contamination in the intake manifold. This causes the swirl valves to become stuck due to soot deposits, among other things. This is a common problem with diesel engines and modern direct-injection petrol engines. This makes it important to properly diagnose the cause of the problem.
The accelerator cable controls the throttle, which is mounted in the intake manifold. In somewhat older cars, a (Bowden) cable runs from the accelerator pedal (gas pedal) to the throttle. In modern engines this is electronically controlled, where there is no mechanical connection between the accelerator and the throttle. Over time, the accelerator cable may stretch and/or snap and must be replaced.
The throttle body provides the air supply to the engine, controlled by the accelerator (gas pedal) via an accelerator cable or electronic sensor. The throttle body is mounted between the intake manifold and the air mass sensor. A poorly functioning throttle body can cause engine failure or irregular idling.
The idle regulating valve, also called the idle control valve, provides for the flow of air to the engine when the throttle valve is closed. This is necessary to allow the engine to idle when the accelerator (gas pedal) is not being operated. When the idle control valve malfunctions or becomes dirty, the engine will idle erratically and, in some cases, an engine malfunction indicator light will illuminate.
The air mass sensor is mounted between the air filter housing and the intake manifold. The air mass sensor measures how much air enters the engine so the ECU or engine control unit knows how much fuel needs to be injected to obtain an optimal mixture. A defective or outdated air mass sensor can result in less power and higher fuel consumption. In most cases, the engine malfunction indicator light will illuminate when the air mass sensor is not correct. However, it could be that this light is not (yet) illuminated because the air mass sensor is just within the parameters which the ECU accepts.
Swirl valves in the inlet manifold, also known as swirl flaps, provide a more efficient supply of air. This in turn should ensure that the engine has a smoother torque conversion (flat torque curve) over a wider range of RPMs. The adjustment of these valves determines the length of the intake path and thus the character of the engine. A short intake range for high RPMs/power, a long intake section for relatively lower RPMs and more torque. Due to ageing and internal contamination, these valves can become stuck or even break off in some cases. This can have unpleasant consequences if loose parts are sucked into the engine. Defective or worn swirl valves can cause engine failure in some cases. In addition, the engine may run a little more unevenly if these are not working or are heavily contaminated, for example.
The potentiometer is a type of sensor which is used to determine, among other things, the throttle position and the accelerator position in cars with 'drive-by-wire' control. If these wear out and/or are defective, malfunctions can occur which can cause the control system to malfunction.
The throttle supplies air to the engine, controlled by the accelerator pedal via an accelerator cable or electronic sensor. The throttle body is mounted between the intake manifold and the air mass sensor. A malfunctioning throttle can cause engine failure or irregular idling, among other things.
| Air supply electric filament adapter Throttle spring Air supply valves Manometer / vacuum gauge |
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