Rough Audi A2: Air-Fuel Mix May Kill Performance

Having experienced similar symptoms with my Audi A4 (2005), I can relate to this issue. The check engine light came on and the engine showed identical behavior, weak acceleration and jerky response when pressing the throttle. After proper diagnostics, the problem was traced to faulty fuel injectors that were not delivering the correct amount of fuel. The symptoms perfectly matched: rough idle, inconsistent power delivery, and poor throttle response. The mass air flow sensor readings were normal, and the intake manifold was clean, which helped narrow down the diagnosis. This turned out to be a serious issue requiring immediate attention, as faulty injectors can lead to catalytic converter damage if left unaddressed. The repair involved replacing two fuel injectors that were completely clogged and cleaning the remaining ones. Key signs it was injector-related: Engine misfiring under load, Rough idle and hesitation, Uneven power delivery, Check engine light indicating fuel system issues Suggest having a professional run a complete fuel system diagnostic test. Bad injectors will show distinct pressure and spray pattern issues during testing.

Having experienced similar symptoms with my Audi A4 (2005), I can relate to this issue. The check engine light came on and the engine showed identical behavior, weak acceleration and jerky response when pressing the throttle. After proper diagnostics, the problem was traced to faulty fuel injectors that were not delivering the correct amount of fuel. The symptoms perfectly matched: rough idle, inconsistent power delivery, and poor throttle response. The mass air flow sensor readings were normal, and the intake manifold was clean, which helped narrow down the diagnosis. This turned out to be a serious issue requiring immediate attention, as faulty injectors can lead to catalytic converter damage if left unaddressed. The repair involved replacing two fuel injectors that were completely clogged and cleaning the remaining ones. Key signs it was injector-related: Engine misfiring under load, Rough idle and hesitation, Uneven power delivery, Check engine light indicating fuel system issues Suggest having a professional run a complete fuel system diagnostic test. Bad injectors will show distinct pressure and spray pattern issues during testing.

Having experienced similar symptoms with my Audi A4 (2005), I can relate to this issue. The check engine light came on and the engine showed identical behavior, weak acceleration and jerky response when pressing the throttle. After proper diagnostics, the problem was traced to faulty fuel injectors that were not delivering the correct amount of fuel. The symptoms perfectly matched: rough idle, inconsistent power delivery, and poor throttle response. The mass air flow sensor readings were normal, and the intake manifold was clean, which helped narrow down the diagnosis. This turned out to be a serious issue requiring immediate attention, as faulty injectors can lead to catalytic converter damage if left unaddressed. The repair involved replacing two fuel injectors that were completely clogged and cleaning the remaining ones. Key signs it was injector-related: Engine misfiring under load, Rough idle and hesitation, Uneven power delivery, Check engine light indicating fuel system issues Suggest having a professional run a complete fuel system diagnostic test. Bad injectors will show distinct pressure and spray pattern issues during testing.

Having experienced similar symptoms with my Audi A4 (2005), I can relate to this issue. The check engine light came on and the engine showed identical behavior, weak acceleration and jerky response when pressing the throttle. After proper diagnostics, the problem was traced to faulty fuel injectors that were not delivering the correct amount of fuel. The symptoms perfectly matched: rough idle, inconsistent power delivery, and poor throttle response. The mass air flow sensor readings were normal, and the intake manifold was clean, which helped narrow down the diagnosis. This turned out to be a serious issue requiring immediate attention, as faulty injectors can lead to catalytic converter damage if left unaddressed. The repair involved replacing two fuel injectors that were completely clogged and cleaning the remaining ones. Key signs it was injector-related: Engine misfiring under load, Rough idle and hesitation, Uneven power delivery, Check engine light indicating fuel system issues Suggest having a professional run a complete fuel system diagnostic test. Bad injectors will show distinct pressure and spray pattern issues during testing.

Thank you for sharing that experience. My issue turned out to be very similar, and the repair shop found that a failing EGR valve was causing most of these symptoms in my A2. They also discovered the fuel injectors needed cleaning during the diagnostic process. Did you remember roughly what the total repair cost was for your injector replacement? Also curious if youve had any related issues pop up since getting it fixed. Some folks mentioned these problems can sometimes indicate wider fuel system concerns.

Thank you for sharing that experience. My issue turned out to be very similar, and the repair shop found that a failing EGR valve was causing most of these symptoms in my A2. They also discovered the fuel injectors needed cleaning during the diagnostic process. Did you remember roughly what the total repair cost was for your injector replacement? Also curious if youve had any related issues pop up since getting it fixed. Some folks mentioned these problems can sometimes indicate wider fuel system concerns.

Thank you for sharing that experience. My issue turned out to be very similar, and the repair shop found that a failing EGR valve was causing most of these symptoms in my A2. They also discovered the fuel injectors needed cleaning during the diagnostic process. Did you remember roughly what the total repair cost was for your injector replacement? Also curious if youve had any related issues pop up since getting it fixed. Some folks mentioned these problems can sometimes indicate wider fuel system concerns.

Thank you for sharing that experience. My issue turned out to be very similar, and the repair shop found that a failing EGR valve was causing most of these symptoms in my A2. They also discovered the fuel injectors needed cleaning during the diagnostic process. Did you remember roughly what the total repair cost was for your injector replacement? Also curious if youve had any related issues pop up since getting it fixed. Some folks mentioned these problems can sometimes indicate wider fuel system concerns.

Thanks for asking about the costs. The repair shop charged 515 Euro for replacing the faulty injection valve, which completely resolved the lean fuel mixture issue. The engine now runs smoothly with proper fuel delivery, no more jerky acceleration or rough idle problems. The mass air flow sensor and throttle body response are now perfect, and I havent experienced any fuel system problems in the months since the repair. The oxygen sensor readings confirm the engine is maintaining the correct air-fuel ratio, which was the main concern before. This repair was actually cheaper than I initially feared when the symptoms first appeared. A failing injector can sometimes be mistaken for other issues like EGR valve problems, so getting the correct diagnosis was crucial. The improvement in performance after fixing the lean condition made it clear this was the right repair.

Thanks for asking about the costs. The repair shop charged 515 Euro for replacing the faulty injection valve, which completely resolved the lean fuel mixture issue. The engine now runs smoothly with proper fuel delivery, no more jerky acceleration or rough idle problems. The mass air flow sensor and throttle body response are now perfect, and I havent experienced any fuel system problems in the months since the repair. The oxygen sensor readings confirm the engine is maintaining the correct air-fuel ratio, which was the main concern before. This repair was actually cheaper than I initially feared when the symptoms first appeared. A failing injector can sometimes be mistaken for other issues like EGR valve problems, so getting the correct diagnosis was crucial. The improvement in performance after fixing the lean condition made it clear this was the right repair.

Thanks for asking about the costs. The repair shop charged 515 Euro for replacing the faulty injection valve, which completely resolved the lean fuel mixture issue. The engine now runs smoothly with proper fuel delivery, no more jerky acceleration or rough idle problems. The mass air flow sensor and throttle body response are now perfect, and I havent experienced any fuel system problems in the months since the repair. The oxygen sensor readings confirm the engine is maintaining the correct air-fuel ratio, which was the main concern before. This repair was actually cheaper than I initially feared when the symptoms first appeared. A failing injector can sometimes be mistaken for other issues like EGR valve problems, so getting the correct diagnosis was crucial. The improvement in performance after fixing the lean condition made it clear this was the right repair.

Thanks for asking about the costs. The repair shop charged 515 Euro for replacing the faulty injection valve, which completely resolved the lean fuel mixture issue. The engine now runs smoothly with proper fuel delivery, no more jerky acceleration or rough idle problems. The mass air flow sensor and throttle body response are now perfect, and I havent experienced any fuel system problems in the months since the repair. The oxygen sensor readings confirm the engine is maintaining the correct air-fuel ratio, which was the main concern before. This repair was actually cheaper than I initially feared when the symptoms first appeared. A failing injector can sometimes be mistaken for other issues like EGR valve problems, so getting the correct diagnosis was crucial. The improvement in performance after fixing the lean condition made it clear this was the right repair.

After talking with everyone here, I wanted to share how my situation got resolved. The mechanic I finally went to ran a proper diagnostic and found the EGR valve was clogged, causing the engine to run with an incorrect air-fuel ratio. They also found two spark plugs that needed replacement. The total repair came to 380 Euro, which included cleaning the fuel injectors as a preventive measure. The oxygen sensor readings are now normal and the engine runs perfectly, no more jerky acceleration or rough idling. Really glad I asked here first, as it helped me understand what questions to ask at the shop. The catalytic converter could have been damaged if I had kept driving it in that condition. The mechanic showed me the dirty components and explained everything clearly, which was a welcome change from my previous experience. Sharing this in case anyone else runs into similar symptoms with their engine. Getting a proper diagnosis from the start definitely saved money in the long run.

After talking with everyone here, I wanted to share how my situation got resolved. The mechanic I finally went to ran a proper diagnostic and found the EGR valve was clogged, causing the engine to run with an incorrect air-fuel ratio. They also found two spark plugs that needed replacement. The total repair came to 380 Euro, which included cleaning the fuel injectors as a preventive measure. The oxygen sensor readings are now normal and the engine runs perfectly, no more jerky acceleration or rough idling. Really glad I asked here first, as it helped me understand what questions to ask at the shop. The catalytic converter could have been damaged if I had kept driving it in that condition. The mechanic showed me the dirty components and explained everything clearly, which was a welcome change from my previous experience. Sharing this in case anyone else runs into similar symptoms with their engine. Getting a proper diagnosis from the start definitely saved money in the long run.

After talking with everyone here, I wanted to share how my situation got resolved. The mechanic I finally went to ran a proper diagnostic and found the EGR valve was clogged, causing the engine to run with an incorrect air-fuel ratio. They also found two spark plugs that needed replacement. The total repair came to 380 Euro, which included cleaning the fuel injectors as a preventive measure. The oxygen sensor readings are now normal and the engine runs perfectly, no more jerky acceleration or rough idling. Really glad I asked here first, as it helped me understand what questions to ask at the shop. The catalytic converter could have been damaged if I had kept driving it in that condition. The mechanic showed me the dirty components and explained everything clearly, which was a welcome change from my previous experience. Sharing this in case anyone else runs into similar symptoms with their engine. Getting a proper diagnosis from the start definitely saved money in the long run.

After talking with everyone here, I wanted to share how my situation got resolved. The mechanic I finally went to ran a proper diagnostic and found the EGR valve was clogged, causing the engine to run with an incorrect air-fuel ratio. They also found two spark plugs that needed replacement. The total repair came to 380 Euro, which included cleaning the fuel injectors as a preventive measure. The oxygen sensor readings are now normal and the engine runs perfectly, no more jerky acceleration or rough idling. Really glad I asked here first, as it helped me understand what questions to ask at the shop. The catalytic converter could have been damaged if I had kept driving it in that condition. The mechanic showed me the dirty components and explained everything clearly, which was a welcome change from my previous experience. Sharing this in case anyone else runs into similar symptoms with their engine. Getting a proper diagnosis from the start definitely saved money in the long run.