2007 Mitsubishi Outlander engine shuddering and grey smoke

May be other injectors needing replaced also

Understanding the Causes of Grey Smoke from a Diesel Engine
When it comes to diagnosing the cause of grey smoke from a diesel engine, it’s important to understand what’s going on inside the engine. There are several different factors that can contribute to grey smoke, including issues with the fuel system, air intake system, and engine components. Let’s take a closer look at each of these causes and how they can lead to grey smoke.

1. Fuel System Issues
The first thing to check when encountering grey smoke is the fuel system. If the engine is getting too much diesel, it will result in incomplete combustion and cause grey smoke. It’s like having too much cake at a party, sure it might taste good at the moment, but eventually, you’ll regret it.

2. Air Intake System Issues
Another common cause of grey smoke is issues with the air intake system. If the engine isn’t getting enough air, it can cause incomplete combustion and lead to grey smoke. It’s like trying to blow up a balloon with a straw, it’s just not going to work.

3. Engine Component Issues
Finally, engine component issues can also contribute to grey smoke. Worn-out injectors, low compression, or clogged turbochargers are just a few examples of engine problems that can cause grey smoke. It’s like having a broken leg in a race, you may have the drive, but you’re just not going to cross the finish line.

How to fix diesel engine grey smoke
Once you have identified the cause of the grey smoke, you can start to explore the various solutions that are available. These can include:

Servicing the Engine: If the grey smoke is being caused by a problem with the engine itself, such as poor timing or clogged air filters, then a full engine service may be in order.
Upgrading the Air Filter: If the air filter is the cause of the grey smoke, then upgrading to a high-quality air filter can help to reduce emissions and improve fuel efficiency.
Regulating Fuel Injection: If the grey smoke is being caused by overfueling, then adjusting the fuel injection system can help to reduce emissions and improve engine performance.