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The BMW Range
3 Series
E46
E46 325 engine reving automatically while driving
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<blockquote data-quote="Vincent Hor" data-source="post: 595996" data-attributes="member: 1221"><p>Bro, ask your mechanic to check the engine temperature sensor. When this fails it can cause the problem you mentioned. This temp sensor sends signal to the ecu. When this fails it reads engine cold then the ecu respond by sending more fuel just like when morning cold start. </p><p></p><p>Another symptom could be difficulty to start when the engine is hot. Engine flooded with fuel. You will also experience very poor fuel consumption. </p><p></p><p>If this is the culprit the fix is cheap. Some workshop will tell you all the possibilities but after spending a lot of money, then to find this the culprit. </p><p></p><p>Try this & update us for all to learn.</p></blockquote><p></p>
[QUOTE="Vincent Hor, post: 595996, member: 1221"] Bro, ask your mechanic to check the engine temperature sensor. When this fails it can cause the problem you mentioned. This temp sensor sends signal to the ecu. When this fails it reads engine cold then the ecu respond by sending more fuel just like when morning cold start. Another symptom could be difficulty to start when the engine is hot. Engine flooded with fuel. You will also experience very poor fuel consumption. If this is the culprit the fix is cheap. Some workshop will tell you all the possibilities but after spending a lot of money, then to find this the culprit. Try this & update us for all to learn. [/QUOTE]
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E46 325 engine reving automatically while driving
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