Top 5 Symptoms of Worn Injectors in Your Diesel 4WD… Rough idling, engine misfires, poor fuel economy, excessive smoke, or that sluggish, loss-of-power feel? 🚫 These red flags can signal worn or clogged injectors, impacting your diesel’s performance on and off-road. If these symptoms sound familiar, it may be time for an injector upgrade! Replacing worn injectors restores fuel efficiency, boosts performance, and keeps your 4WD ready for every adventure. Don’t let old injectors hold you back! 🔧