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Rough Idling and Stalling
AI Analysis Summary
The car is experiencing a very rough idle, to the point of almost stalling or actually stalling, particularly when stopped at traffic lights.
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أسئلة
5 أسئلةWhen did this problem start? (ID: 3594)
A few days ago
Are there any warning lights illuminated on the dashboard? (ID: 3595)
No
Does the rough idle occur only when the engine is cold, or also when it's fully warmed up? (ID: 3596)
Both cold and warm
Have you noticed any changes in fuel economy or engine performance other than the rough idle? (ID: 3597)
Yes, worse fuel economy
What is the make, model, and year of your car? (ID: 3598)
2015 Honda Civic
Identified Causes
4 أسبابتسرب هواء
80%تسرب في نظام التفريغ يمكن أن يعطل خليط الهواء والوقود، مما يؤدي إلى تباطؤ غير مستقر واحتمالية توقف المحرك.
صمام التحكم في الهواء الخامل (IAC) المتسخ أو المعيب
75%صمام IAC ينظم كمية الهواء التي تدخل المحرك عند التوقف. إذا كان متسخًا أو به خلل، فقد يتسبب في اهتزاز المحرك عند التوقف وتوقفه.
مشاكل شمعة الإشعال أو نظام الإشعال
70%شمعات الاحتراق البالية، أو ملفات الإشعال المعيبة، أو أسلاك شمعات الاحتراق التالفة يمكن أن تؤدي إلى اختلالات في الاشتعال، مما يسبب اهتزازًا خشنًا للمحرك وتوقفًا محتملاً.
حاقنات وقود مسدودة
60%يمكن أن يؤدي انسداد حاقنات الوقود أو اتساخها إلى توصيل وقود غير صحيح، مما يؤدي إلى حالة فقيرة واهتزاز خشن عند التباطؤ.
Recommended Solutions
8 حلولClean IAC Valve
🤖 AI Analysis
"A rough idle, especially when the engine is both cold and warm, and accompanied by worse fuel economy, strongly suggests an issue with air-fuel mixture control. The Idle Air Control (IAC) valve is a primary component responsible for regulating idle speed. Carbon buildup can cause it to malfunction, leading to these symptoms. Cleaning it is a common and effective first step."
Replace IAC Valve
🤖 AI Analysis
"If cleaning the IAC valve (Solution 4029) does not resolve the rough idle and poor fuel economy, then the valve itself may be faulty and require replacement. This is a logical next step if the initial cleaning attempt is unsuccessful."
Inspect Vacuum Hoses
🤖 AI Analysis
"Vacuum leaks can cause unmetered air to enter the engine, disrupting the air-fuel ratio and leading to a rough idle and decreased fuel economy. Inspecting vacuum hoses is a straightforward diagnostic step that can identify common sources of such leaks."
Perform Smoke Test
🤖 AI Analysis
"While a smoke test is more involved than a visual inspection, it is highly effective at pinpointing even small or difficult-to-find vacuum leaks that might be contributing to the rough idle and poor fuel economy. It's a good follow-up if visual inspection of hoses doesn't reveal the problem."
Inspect and Replace Spark Plugs
🤖 AI Analysis
"Worn or fouled spark plugs can lead to incomplete combustion, resulting in a rough idle and reduced fuel economy. While the user hasn't reported misfires specifically, this is a common maintenance item that can cause the described symptoms."
Test Ignition Coils/Wires
🤖 AI Analysis
"Faulty ignition coils or spark plug wires can cause misfires, leading to a rough idle and poor performance. Although no warning lights are on, this is still a possibility that affects the combustion process and fuel economy."
Use Fuel Injector Cleaner
🤖 AI Analysis
"Dirty fuel injectors can lead to an uneven fuel spray pattern, affecting combustion and causing a rough idle and worse fuel economy. Using a fuel injector cleaner is a less invasive approach to address potential injector issues."
Professional Fuel Injector Cleaning
🤖 AI Analysis
"Similar to using a cleaner, professional fuel injector cleaning can address issues with fuel delivery. However, it's a more involved and costly solution than simply adding a cleaner, making it a lower priority unless simpler methods fail."