Diesel Injection Issues: Rough Running & Poor Starting

Had a similar issue with my 2016 Insignia diesel. With some experience working on cars, I recognized these symptoms immediately since they match what I encountered last year. My vehicle showed identical performance issues, rough idle, hard starts, and terrible fuel economy. After checking basic maintenance items, I took it to a repair shop since injection systems need specialized diagnostic equipment. The repair shop confirmed dirty injection valves were causing these emissions and performance problems. The complete service included: Full diagnostic scan, Injector cleaning and testing, Replacement of one faulty injector, System reset and calibration Total cost came to 515 for parts and labor. Since the repair, the engine runs perfectly again with normal fuel consumption. Before suggesting specific fixes for your Cascada, could you provide: Current mileage, Service history details, Check engine light status, Any error codes shown, When symptoms first appeared This would help determine if your vehicle likely has the same underlying issue and repair needs. Consider having a proper diagnostic done soon, as injection problems can lead to more serious engine damage if left unaddressed.

Thank you for sharing your experience. My 2014 Cascada has 197290 KM on the odometer with the last major service completed 3 months ago. I did notice the misfire symptoms started shortly after switching to a different fuel station. The check engine light began flashing intermittently last week, which prompted my concern about potential fuel system clogging. Based on your repair details and similar symptoms, I will schedule a diagnostic scan to check the injection system. Sounds like catching this early could prevent more extensive diesel engine repairs later.

Looking at your mileage and timing of symptoms, switching fuel stations likely contributed to the injection system issues. When I had similar problems with my Insignia, the diagnostic scan revealed that lower quality diesel fuel had caused clogging in the injectors, leading to the misfire and performance problems. The flashing check engine light is concerning, in my case this indicated severe misfire that could damage the catalytic converter. Getting the diagnostic done quickly is smart. My repair costs stayed reasonable because I caught the issue before it caused additional engine damage. The good news is that fuel system cleaning and injector service should resolve these symptoms, based on what fixed my vehicle. Consider using a fuel system cleaner additive with your next few tanks of diesel and stick to high-quality fuel stations. After my injection system repair, I switched to premium diesel fuel which helped prevent the clogging issues from returning. One tip from my experience: have them check the fuel filter too. In my case it was partially clogged from the poor quality fuel, contributing to the rough running and performance issues.

Thanks for sharing those details. The timing of symptoms starting after switching fuel stations definitely reinforces my suspicion about fuel system clogging. My vehicle odometer shows 197290 KM and that last major service was only 3 months back, so the maintenance schedule has been followed properly. The flashing check engine light is concerning, especially after hearing about your experience with injection system problems. Will schedule that diagnostic scan this week to check if its the same issue you encountered. Good point about the fuel filter too, I will have them inspect that during the checkup. Based on the repair costs you shared, this seems like a reasonable investment to prevent more expensive diesel engine damage. Will also switch back to my regular fuel station and maybe try that fuel system cleaner you mentioned. Really appreciate you walking through your repair experience, it helps put my mind at ease about getting this resolved before it becomes a bigger problem with my vehicle.