What is a common indication of fuel injector problems in diesel engines?

Poor acceleration and increased fuel consumption are key indicators of fuel injector problems in diesel engines. When the fuel injectors are not functioning optimally, they may deliver fuel inappropriately—either flooding the engine with too much fuel or providing too little, both of which can lead to inefficient combustion. This inefficiency typically manifests as reduced power output and sluggish acceleration.

Increased fuel consumption occurs because the engine compensates for the incorrect fuel delivery by using more fuel to try to achieve the desired performance, leading to a noticeable decline in fuel efficiency. Monitoring these symptoms can help diagnose injector issues early, ensuring better engine performance and longevity.

Regular maintenance is indeed important for diesel engines, but it is not an indicator of fuel injector issues. Increased engine noise could be associated with a variety of problems, not exclusively related to fuel injectors. Low coolant levels are indicative of cooling system issues rather than problems related to fuel injection.