Subaru Fuel Injector Woes: From Stalling to Solution

Having dealt with similar injection issues on my 2007 Subaru R2, I can share some relevant repair experience. The symptoms you describe match exactly what I encountered, rough idling, increased fuel consumption, and inconsistent engine performance. After several diagnostic tests, my repair workshop confirmed dirty injection valves were causing these engine problems. The repair included a thorough cleaning of the injection system and replacement of two faulty injectors. Total cost was 515€, including parts and labor. The repair process took about 4 hours, and the improvement in vehicle performance was immediately noticeable. Engine running became smooth again, fuel efficiency returned to normal, and the startup issues completely disappeared. Based on your description, it sounds very similar, but to provide more specific guidance, could you share: current mileage, Service history related to fuel system, Type of fuel you typically use, Check engine light status, any diagnostic codes present This information would help determine if your vehicle requires similar injection system maintenance or if other potential issues need investigation. Worth noting that regular fuel system maintenance can prevent these problems. Since the repair, I make sure to use quality fuel and proper fuel system cleaners as recommended by the workshop.

Thanks for your insights. My current mileage is 136256 KM and the last fuel system service was completed during the regular maintenance about 8 months ago. The engine performance has definitely declined since then, with the misfire becoming more noticeable especially during cold starts. The check engine light came on last week and stays illuminated. Unfortunately, I dont have access to the diagnostic codes right now. I typically use premium 95 octane fuel from major stations. The clogging and performance issues you mentioned sound very similar to what I am experiencing. Based on your repair costs, I will budget around 550€ for the injector replacement and cleaning. Have you encountered any repeated injection problems since your repair?

Yes, I can provide some follow-up insights from my experience with the Subaru R2 injection system repair. After the initial fix about 2 years ago, I had no recurring injection problems until recently when I noticed minor engine misfires again. However, this turned out to be unrelated to the injectors. The symptoms were less severe than before, and a diagnostic check revealed it was actually a failing ignition coil causing the misfire. This repair was much simpler, costing only 180€ for parts and labor. Your mileage and maintenance timeline suggest you are likely dealing with the same injection issue I initially faced. The illuminated check engine light strongly points to fuel delivery problems, which matches the classic symptoms of faulty injectors in these engines. Since your last fuel system service was 8 months ago, consider requesting a fuel system pressure test when you take it in. My repair workshop found this test particularly helpful in pinpointing the exact injectors causing problems. A preventive tip from my experience: after the repair, using a fuel system cleaner every 15000km helped maintain optimal injection performance and prevented deposit buildup. This small investment in maintenance has helped avoid any major injection-related issues since the repair. Your 550€ budget seems realistic based on current repair costs and parts availability for these vehicles.

Based on this detailed information, I will plan to take the car in next week for diagnostics and likely injector replacement. The symptoms align perfectly with what you experienced, and the similar repair timeline gives me confidence in the solution. The fuel pressure test you mentioned makes sense, I will specifically request this when booking the service. Good to know about the possibility of ignition coil issues too, since the symptoms can appear similar. I will have them check the entire ignition system while diagnosing the engine performance problems. Your experience using fuel system cleaner is particularly helpful. Once the injectors are serviced, I will implement regular fuel system cleaning as preventive maintenance. The gasoline quality combined with system cleaners should help maintain proper injection performance long term. The 550€ repair budget feels more comfortable now knowing your costs and the scope of work involved. Definitely worth the investment to restore proper engine operation and fuel efficiency. Will update the forum once the repair is completed to share the outcome and final costs for others with similar vehicle issues.