Motoring Discussion > Euro 4 & 5 engine diesel smoke. Miscellaneous
Thread Author: Old Navy Replies: 7
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New Sun 20 Feb 11 19:45 
 Euro 4 & 5 engine diesel smoke. - Old Navy
I have seen reports on some forums of low (ish) mileage Euro 4 & 5 spec diesel engines from various manufacturers suffering from fouled injectors due to the extremely tight clearances used to meet the spec. The symptoms seem to be white /grey smoke on cold starts, rough running, and increased fuel consumption. Does anyone have experience of this?
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New Sun 20 Feb 11 22:04 
 Euro 4 & 5 engine diesel smoke. - WillDeBeest
Yes. At about a year old our 2008 Verso with the 2.2 140 engine and no DPF started doing just that. No clues what brought it on but the solution was a new set of injectors, all smoothly handled under warranty; only real hardship was two days with a Yaris.

I posted some comments at the time (Easter 2009) on the HJ site. Two years on, we've had no further problems.
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New Sun 20 Feb 11 22:14 
 Euro 4 & 5 engine diesel smoke. - Iffy
...Does anyone have experience of this?...

No, but I'll keep an eye open.

Don't want that to happen outside warranty in a year's time.
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New Mon 21 Feb 11 07:34 
 Euro 4 & 5 engine diesel smoke. - Old Navy
>> ...Does anyone have experience of this?...
>>
>> No, but I'll keep an eye open.
>>
>> Don't want that to happen outside warranty in a year's time.
>>

Most seem to be fixed with a dose of injector cleaner, Some of the 2010 on KIA Ceed's fitted with the U2 engine have had this problem. A dose of Millers fixed mine. :-)
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New Mon 21 Feb 11 10:06 
 Euro 4 & 5 engine diesel smoke. - hobby
Nothing on mine, either... Though at about 14k pa I'm not sure if I'm low(ish) mileage or not!
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New Mon 21 Feb 11 10:23 
 Euro 4 & 5 engine diesel smoke. - WillDeBeest
Just for completeness, our problem occurred at about ten months and 9,500 miles, and it was getting a fast 170-mile motorway trip most weeks, so I don't think lack of exercise was a factor; the dealer certainly didn't suggest so. Perhaps 'low mileage' in the OP means 'early in its life'.
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New Mon 21 Feb 11 10:46 
 Euro 4 & 5 engine diesel smoke. - hobby
Definitely nothing then!
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New Mon 21 Feb 11 11:13 
 Euro 4 & 5 engine diesel smoke. - Old Navy
By low mileage I mean that some cars have been affected below 5,000 miles, been rejected and replaced. I don't think anyone considered injector fouling at that mileage and as it was winter blamed glow plugs but could not find a fault.

An internet search for "Diesel injector fouling" shows that it is an increasing problem with new spec diesels.
Last edited by: Old Navy on Mon 21 Feb 11 at 11:16
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