I have a Hino 338, 2012 Model, I had a problem while driving, after few kilometres the truck lost the power, when I press the gas pedal, the truck doesn't go fast, and finally, it stopped. After towing to the Hino Service, they have told the fuel heater damaged and need to replace. After fuel heater replacement, 2 days after I experienced the same problem of losing power when I press the gas pedal. Also when I opened the hood, there is no diesel in the showing in the fuel filter. (I am not sure diesel should be there in the fuel filter), Can someone help what's the problem?