So my 2016 Grand Cherokee with 140k km on the clock started developing a slight stumble at idle and a bit of hesitation when pulling away from a stop. I already replaced the spark plugs and cleaned the throttle body, but the issue didn't go away. A friend suggested I try a proper fuel injector cleaning – not the bottle stuff you pour in the tank, but an actual ultrasonic and flow test service. I wasn't even sure where to get that done in Abu Dhabi until I found a page mentioning Professional Jeep Injector Cleaning Abu Dhabi and decided to give it a shot. The shop pulled the injectors, cleaned them on a machine, and showed me the before/after spray patterns – huge difference. Cost me around 450 AED and the engine feels much smoother now, plus I swear my fuel economy improved a bit too. I'm just wondering how often I should do this on a high-mileage Jeep. Every 50k km? Only when symptoms appear? Anyone else had long-term success with injector cleaning? Definitely cheaper than buying new injectors, that's for sure.