Your injectors are vital to keeping your diesel engine running at its best. So, you need them to run as efficiently as possible.
That means using the correct trim codes for your injectors.
So, just where can you find your trim codes, and how do you use them? We’re taking you through that and more in this post!
What Are Trim Codes?
Put simply, trim codes, or trim files as they’re also known, are codes that go into the Electronic Control Module (ECM). This affects the injection process of the fuel injectors in your diesel engine.
This programming is actually crucial for the efficiency of your fuel system, and manufacturers have implemented it in most diesel engines.
Where Are Trim Codes Located?
Like with your engine serial number, each manufacturer puts their trim code in a different spot on the fuel injector. There is no standard system for trim code placement, or even for the trim codes themselves.
In some cases, injectors come with a trim code disc to be programmed into the ECM. It is more common, though, for the trim code to come physically stamped on the injector itself. This makes it easier to read for the installer.
For a lot of injectors, this stamping is done on the solenoid.
In other cases, like with Delphi injectors, you’ll find a parts sticker on the body of the injectors.
Some Bosch common rail injectors have the trim code marked on the top of the plastic housing, or on the coil of the injector.
The location all depends on the manufacturer and the model. When in doubt, check the user manual to help you find the trim codes on your specific injectors.
What Trim Codes Help Increase Diesel Engine Performance and Power?
We’re sure you want to get the best performance out of your diesel engine, so you’re probably wondering what trim codes can help increase power and performance.
Trim codes can actually be altered to adjust the injection performance, but that’s not usually recommended.
The best trim code is the one provided by the manufacturer.
What Happens If I Use the Wrong Trim Code?
If you use the incorrect trim code, you might notice:
- Poor Fuel Economy
- Rough Idle
- Engine Damage (in some cases)
Using the wrong trim code will not provide efficient fuel injection to your engine. The trim codes are tailored by the manufacturer to help get the best performance out of an engine model.
It’s best to not rely on general information when it comes to your trim codes. The same code is not always right for each injector, but hot codes can be used across certain sets of injectors, such as flow-matched, to increase engine performance.
Highway & Heavy Parts is Here To Help!
We want to help you with your diesel engine parts needs!
If you need new injectors, or have questions about your trim codes, we can help. Our ASE Certified Technicians are ready to help you diagnose your diesel engine problems and help make sure you’re getting the parts you need.
We have a wide selection of injectors and other diesel engine components to ensure you’re getting the right fit for your engine.
From diagnosis through delivery, we’re Highway & Heavy Parts!
Related Articles:
WHEN SHOULD YOU REPLACE DIESEL ENGINE FUEL INJECTORS? SIGNS AND SYMPTOMS EXPLAINED
DIAGNOSE COMMON RAIL INJECTOR SYMPTOMS AND FAILURES IN DIESEL ENGINES
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