I have a 2012 258 in rollback service with a lack of power . . maybe.
The truck runs fine, no Check Engine light, rough run, or other obvious symptom. However compared to another, virtually identical truck, and to our other Hinos in general, this truck feels down on power. It accelerates with less vigor, feels sluggish when pulling hills, and these symptoms are magnified when the truck is loaded. Strangely however, the symptom doesn't get worse when the truck is used to tow 2 cars.
Several shops have looked at this truck, although I doubt in any detail - pretty much everyone says the same thing "If there's no Check Engine light, its fine"
The truck has about 425k on it, and has had the usual barrage of repairs - DPFs, injectors, various sensors in the DPR and SCR systems, etc. I believe it had an injection pump at one point. Most recently all of the pressure side intake hoses and clamps were replaced. None of these repairs has improved the power of the truck, although they did address the acute issue that led to their replacement.
Fuel filters are replaced with Hino filters pretty much every 10k along with a standard PM.
Anyone have any suggestions on what/where to look that I can share with a local shop? Or encountered something similar to this and found a root cause?
Thanks, Gregg
The truck runs fine, no Check Engine light, rough run, or other obvious symptom. However compared to another, virtually identical truck, and to our other Hinos in general, this truck feels down on power. It accelerates with less vigor, feels sluggish when pulling hills, and these symptoms are magnified when the truck is loaded. Strangely however, the symptom doesn't get worse when the truck is used to tow 2 cars.
Several shops have looked at this truck, although I doubt in any detail - pretty much everyone says the same thing "If there's no Check Engine light, its fine"
The truck has about 425k on it, and has had the usual barrage of repairs - DPFs, injectors, various sensors in the DPR and SCR systems, etc. I believe it had an injection pump at one point. Most recently all of the pressure side intake hoses and clamps were replaced. None of these repairs has improved the power of the truck, although they did address the acute issue that led to their replacement.
Fuel filters are replaced with Hino filters pretty much every 10k along with a standard PM.
Anyone have any suggestions on what/where to look that I can share with a local shop? Or encountered something similar to this and found a root cause?
Thanks, Gregg
