Hello everyone.
Had my IS250 SE-L since November last year and I'm very pleased with it.
However, I'm increasingly experiencing a problem. When I return from work, I have to turn right into a lane with quite a steep uphill gradient. I'm quite gentle on the accelerator at all times, but I have to "boot" it on this hill otherwise I get vibration from the engine labouring. It's not just a gentle increase in throttle pressure required, but quite heavy, otherwise it won't change down a gear.
More recently, I've noticed similar vibration/labouring on flat roads with 30mph speed limit. It's as if the car is trying to operate in too high a gear at about 1100rpm. I'm all for changing up rapidly to get maximum return on fuel consumption, but what I'm experiencing seems excessive as I don't believe I should experience vibration and labouring. A blip on the throttle gets it to change down, but I think the car should "automatically" select the correct gear ratio to avoid labouring the engine.
Can anyone throw any light on this please ?
Steve.