2019 Isuzu D-Max would not rev to cross a small rise
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Asked by Paul
While driving on a sandy track my 2019 Isuzu D-Max would not rev to allow me to crest a small rise. After a few minutes it was okay again. Drove perfectly after that.
Answered by CarsGuide
8 Mar 2024Sandy conditions are incredibly hard on every aspect of a four-wheel-drive. The sand itself constantly shifts under the tyres and clings to them as well, dragging them down and making the engine and transmission work very hard to maintain progress. You may have already noticed that you use a lot more fuel in sandy country and it’s all because you need to be constantly making more power to maintain speed than in normal conditions. Turbocharged engines and automatic transmissions, in particular, can get very hot very quickly in sand.
With that in mind, it’s very possible that something in the driveline got hot enough for the car’s computer to go into limp home mode to protect what ever was hot from damage. Limp home mode often involves limiting engine revs and turbo boost, both of which contribute to heat production. This would explain why the car would not climb a crest but came good after a break.
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