Vibration and engine labouring in my 2023 Isuzu MU-X
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Asked by Kenneth
I have a 2023 Isuzu MU-X LSU 4x4 and lately I’ve noticed that driving along in top gear at around 100km/h, whether I’n in cruise-control or not, when going up a slight grade or slope, the car labours and seems to vibrate slightly. When it kicks back a gear it’s fine. I have put injector cleaner in it but still feels the same. The car has only done 10,000km.
Answered by CarsGuide
3 Jun 2024What you’re experiencing is the transmission calibration that many modern vehicles use to increase fuel economy. By always trying to be in a higher gear, the vehicle will record a better fuel economy number on the official test that compares it with its competitors.
The downside is that the constant upshifting means the vehicle will sometimes find itself in a gear that’s slightly too tall, and that’s when you’ll start to get the symptoms of feeling like the engine is labouring or lugging.
As you’ve noted, when the car shifts down a gear, the sensation goes away. The solution is to manually pull the car back a gear when this happens. If t really bothers you, you could ask Isuzu if there’s a software update that makes the transmission a little less eager to be in top gear.
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