Mazda Mazda 6 (2002 - 2007) - 05 2.0 Black smoke/knocking noise

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Tue 2 Feb 2010 13:07
05 2.0 Black smoke/knocking noise - Vixx
I have owned my Mazda 6 Diesel TS2 (136) for approx 18 months now with 140,000m on the clock.

First problem I encountered was the dreaded diesel pump change which I have just finished paying for (£1500 in total) but now I have a new fault and was just trying to find some advise or previous experience on this as I have trawled the internet and still non the wiser (i am a woman though!)

Basically over Christmas I was drivng to work when the engine started making a very loud knocking noise this only seemed to happen when I was not accelerating, looked in my rear mirror and the car was chucking out a load of black smoke. Managed to get it to work by this time it had stopped so only lasted about 2mins. Started it at work and did the same. AA man towed it back home and since then it has been idle until approx a week ago (was convinced id blown the engine)

A family friend/mechanic had a look at last week, started it and it was perfect no noise no black smoke? He checked the oil and basically it was like syrup?

Before I take it to the Mazda dealership (and run up a huge bill) would thought I'd try and see if anyone else has any idea what the fault may be, and should I cut my loses and get rid of the thing!!
Thanks in advance, Vicky

Edited by Vixx on 02/02/2010 at 13:10

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Tue 2 Feb 2010 13:41
05 2.0 Black smoke/knocking noise - piston power
Vixx Black smoke is over fueling can be caused by a restriction of air into the air filter and more fuel pumped in, check the air filter is clean and nothing blocking the inlet pipe.

Egr valve blocked.

The oil when was this last changed? serviced?

Edited by bigtee on 02/02/2010 at 13:42

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Tue 2 Feb 2010 13:50
05 2.0 Black smoke/knocking noise - Vixx
The oil was changed on the last service which was just before I bought it. But the oil was ?topped up? by my better half but we just bought diesel oil (I now know that we should have bought semi synthetic & I?m not sure what exactly we put in)

This weekend we was going to drain the engine oil & put in the correct high performance oil?
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Tue 2 Feb 2010 13:58
05 2.0 Black smoke/knocking noise - piston power
I have owned my Mazda 6 Diesel TS2 (136) for approx 18 months now with 140,000m on the clock

You have had it 18+ months and never changed it?

That poor car is in need of a service or get your purse out.!

Buy fully synthetic diesel oil like millers or mobil 1 etc and a genuine filter & air filter, fuel filter & check the brakes need i go on.!

Edited by bigtee on 02/02/2010 at 14:00

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Tue 2 Feb 2010 14:03
05 2.0 Black smoke/knocking noise - Vixx
I know that now :(
But having three jobs the last thing on my mind was to service my car.
But now from experience it?s the first thing on my agenda!
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Tue 2 Feb 2010 14:06
05 2.0 Black smoke/knocking noise - piston power
How many miles have you done since you bought it?
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Tue 2 Feb 2010 14:13
05 2.0 Black smoke/knocking noise - Vixx
I would say approx 10,000 miles.
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