If you've always driven older model diesel engines, you may not be familiar with the changes that have occurred in the common-rail injector systems. These systems operate under higher injection pressure, which makes them more prone to potential failures. Understanding some of the most common problems can help you spot trouble with your diesel engine's injectors before it leads to total failure. Here are some of the things to watch for.
Internal Leaks Or High Return Flow
If you're seeing an engine code that indicates low pressure in the common-rail system and your engine has become harder to start, that's a sign that there's a leak or similar problem in the system. It can be the result of leaks in the cross feed tubes, a blown high-pressure seal, or even a crack in the injector or nozzle body.
The best way to avoid problems like this is to keep up with your fuel system maintenance. Keep your injector system clean, make sure the fuel filters are replaced regularly, and source your fuel from trustworthy sources so you don't risk contaminants.
You should also avoid using any aftermarket injection parts that haven't been specifically designed for your engine. If you see any metallic burns on replacement parts, don't use them. Contact your supplier and get the parts replaced. Finally, don't mix the injector needles. Each one is properly matched based on its location, so moving them could lead to improper lift or clearance issues.
No Injection At All
If your balance rates are reading high, that's a key indication that the injection system isn't flowing properly. The balance rate reads high when the computer determines that fuel needs to be added to the cylinder. You may also see an engine fault code that indicates a problem. Lack of injection can be a simple problem such as rust flakes plugging the injector nozzle, or it could be something more serious, such as loss of compression in the cylinder.
In addition to standard fuel system maintenance, you can reduce the risk of these problems by avoiding any parts that have burrs on them and distributing the returns from your pump kits across multiple lines.
These are two of the most common problems with fuel injection systems in diesel engines. If you're potentially experiencing problems like this, you should reach out to a local diesel engine mechanic right away. He or she can help you to evaluate the engine and identify the cause of the problem right away.Share
1 August 2017
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