Peugeot 308P3067 Throttle Body Fault

The throttle of Pacific Auto Network is dirty. The specific performance is vehicle idling jitter; Cold cars don't strike easily; The tachometer pointer is unstable at idle speed (unstable at idle speed).

Cause of throttle body failure: Oil vapor is the main cause. When the engine is working normally, there must be crankcase exhaust gas, especially if the engine uses relatively low-grade oil. In a particular design, one of the crankcase exhaust systems is connected to the front of the throttle.

Part of the hot crankcase exhaust gas may return to the front of the throttle through the small hole. When idling, this hot crankcase exhaust gas will gradually cool with the air inlet, and finally the temperature will be so low that a layer of oil film will be formed near the throttle valve to further absorb dust. On the other hand, the other part of the crankcase exhaust system is connected with the throttle valve, and this exhaust gas will directly pollute all vacuum tubes, including the fuel regulator.

Another important reason is that high gear and low speed are indispensable during driving, and neutral taxiing is indispensable. At this time, the mixture containing hydrocarbons may have the phenomenon of anti-channeling. When high-temperature hydrocarbons come into contact with low-temperature intake system components, carbon will inevitably accumulate, which is also a common throttle black mud. (Photo/Text/Photo: Pacific Auto Network Chen Jie 2)