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Toyota LandCruiser: black smoke on acceleration

I get black exhaust smoke when I accelerate hard or engage the turbo on my 2009 V8 diesel Toyota Landcruiser Sahara. The dealer says this is normal, what do you say? Also, what do you think about aftermarket chips?

It’s not normal to get black smoke under acceleration, that suggest it’s being over-fuelled and should be looked into. Aftermarket chips can be worthwhile, but they generally take the engine closer to the limit than does the factory chip, so you need to find an installer who can be trusted to do the job well. I wouldn’t do it on your car until the warranty runs out, and then consider it.

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