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Recently bought 2004 Mazda 6 Sport Wagon with 2 litre diesel engine (pre-DPF). It's been very good for a couple days of ownership. Just a question - is EGR a big problem on this engine?
There's quite a bit of soot around EGR valve, might as well take it out and clean it. Anything to be aware of?
Fuel ecomony is good, getting 7L/100km when driving on mixed roads. My foot isn't particularly light either.
It's just there's rev hunting when engine is cold, that's about it.
 

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I did my 2.0l 2007 model with 160000klms on it yesterday and was a bit pf build up but nothing detrimental.
 
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