Q & A

Almost All Your Questions Will Be Answered

Why does my Diesel Particulate Filter (DPF) keep plugging up for no reason?

95% of the time, this is caused by lack or improper spec’ing of an
engine to its specific duty cycle. Other causes include shorted-out sensors
in range or internal coolant leaks, causing repair bills as high as $15,000.

How do I know if my engine is spec’d properly?

If you have to ask, it is probably not. When trucks are ordered, they are spec’d to general, factory settings and are not set up for specific work duties.  For example, if you use a factory spec’d truck for stop-and-go short distance deliveries with constant idling, it will use the engine differently than if you were to run that same truck long-distances with a majority of highway driving.  Lloyd Diesel will tune your unit’s ECM for its specific work duty, thus maximizing its efficiency.

Will it affect my warranty?

No, having LDT spec your engine to increase efficiency does not void your warranty.

What can I expect from these changes?

Our customers see a huge  drop  in aftertreatment related repairs and down-time, and in many cases, nearly eliminating them. With regular cleaning at recommended services, an engine will be able to run longer and with little or no incident.

Does this negatively effect my fuel economy?

No, it actually improves it. When an engine is properly spec’d, it spends less time working with a plugged filter, thus working at maximum efficiency. In some cases we have seen 1.1 MPG improvement across a fleet and are able to get some units into the 10 MPG. range for Class 7 Vocational.

How much does it cost?

It is very affordable in the grand scheme of your business and how efficient you can run your fleet. In most cases, you can recover your investment in as little as 6 weeks when factoring fuel savings, cost of repairs and lost revenue from down-time,

How long does this last?

These are sustainable changes and once we have made the changes in your engine’s specifications, your are pretty much set. Your unit will run this way for the rest of its service life.

What other services do you offer?

We can provide preventive maintenance education and training on your aftertreatment systems to help identify problems before they start.  We also offer education services that will help teach your drivers how to drive their “engine”, not their truck, and maximize their performance.


If you are like us and just want to talk to a human being, call the number below and learn more about how Lloyd Diesel Technologies can optimize your fleet’s performance.

+ 1 (916) 666-9980