Jeep Commander Fuel System Issues: DIY Fixes & Help

I had a very similar issue with my 2019 Jeep Grand Cherokee with the gasoline engine. The symptoms were almost identical, poor engine performance, rough idling, and occasional misfires. After experiencing these issues, I took it to a workshop where they diagnosed dirty fuel injectors as the root cause. The technician performed a thorough fuel injection system cleaning and testing procedure. The repair included: Complete ultrasonic cleaning of all injectors, Flow rate testing, New seals and filters, System pressure testing The total repair cost was 515 Euro, but it completely resolved the performance issues. The engine now runs smoothly, and fuel consumption returned to normal. However, before jumping to conclusions about your Commander, it would be helpful to know: How many miles/kilometers are on the engine? Have you noticed any check engine lights? When was your last fuel system service? What type of fuel do you typically use? This information would help determine if your situation matches what I experienced and could guide you toward the most effective repair solution. Remember that regular maintenance and using quality fuel can help prevent injector issues in the future.

Last service was at 115000 km and the warning light appeared around 126000 km. The mechanic ran diagnostics showing multiple injector-related fault codes. Current mileage is 126651 km. The fuel injection system cleaning suggestion makes sense. Our symptoms match closely, though my stalling issues seem more severe. I typically use standard 95 octane fuel from major stations. Before going for a full injector replacement, I will try the cleaning service first. It seems more cost-effective than immediate replacement, especially since the engine is relatively young with moderate mileage. Have you experienced any recurring issues since your repair was completed? The price seems reasonable if it resolves all these performance problems.

A quick update on my previous repair experience, after that initial fuel injection system cleaning I mentioned, I have put another 35000 km on my Cherokee with zero performance issues. The original symptoms never returned, confirming that cleaning was the right choice. Your situation sounds nearly identical to what I faced. The fact that you are using quality fuel from major stations is good, but clogging can still occur over time. Given your mileage and symptoms, especially the emissions-related fault codes, a thorough cleaning should resolve the misfire and performance issues. One tip from my experience: after the cleaning service, run a tank of premium fuel with a quality fuel system cleaner additive. This helped ensure any remaining deposits were cleared out. My fuel consumption dropped by about 15% after the service and cleaning combination. Just make sure the workshop performs the complete cleaning procedure including flow testing. Some places only do basic cleaning which might not fully resolve deep-seated clogging issues. Keep monitoring the engine performance after service. If you notice any return of rough idling or power loss within the first few thousand kilometers, that might indicate a need for injector replacement after all.

Thanks for sharing your follow-up experience. I will proceed with the fuel injection system cleaning as my next step. Since my vehicle also has fault codes showing up, I will request a full diagnostic readout before and after the service to confirm the repair effectiveness. I appreciate the tip about using premium fuel with cleaner additive afterward. Makes sense to maintain the system once it is cleaned. The ongoing positive results from your repair are encouraging, especially with no issues after 35000 km of driving. I will schedule the complete cleaning service including flow testing this week. The potential 15% reduction in fuel consumption would be a welcome benefit alongside resolving the performance issues. If the cleaning does not fully fix the problem, at least I will know injector replacement is truly necessary rather than jumping straight to that more expensive repair. Will keep track of how the engine performs after the service. Good to know I should watch for any symptoms returning in the first few thousand kilometers as a sign that more extensive repairs might be needed.