Too Clean?!

[brightspark]

theres no smoke without fire

 

[SmartWerks]

That's sort of the point,

Not quite the same as you are unable to finish the smoke test as there is no smoke
But something I would not do

Can you explain a bit more about the emissions test with regards to diesal motors. what is it not emitting on fast idle that a petrol motor does?

I'm not a diesel all fan, its dirty crap that was cheap for commercial/industrial use. It does have more stored energy than petrol but the true cost to maximise that makes it overpriced and still unpleasant to drive.......

 

[doubleboost]

That's sort of the point,


Can you explain a bit more about the emissions test with regards to diesal motors. what is it not emitting on fast idle that a petrol motor does?

I'm not a diesel all fan, its dirty crap that was cheap for commercial/industrial use. It does have more stored energy than petrol but the true cost to maximise that makes it overpriced and still unpleasant to drive.......

In short carbon monoxide
The diesel emission test has no "fast idle" test (that is for petrol cat tests)
What you have is a series of measured acceleration tests
With different values for normal or turbo engines

 

[ukracer]

The test only measures particulates (black smoke) there are still loads of nastys in the exhaust
I have never even thought of issuing such a advisory
Most modern diesels wont give a reading on the smoke test

But the biggest problem we have is knowing what to do to the DPF. My Navara keeps going into limp mode if I boot it hard.. It has been suggested that I dont use a DPF replacement pipe as it will need a remap if I remove it and when I put it back on its wont pass its MOT.

In future they are planning to check the dpf exists and functions so I am told BUT dont know how or if this is feasible. I would like to cut it open remove the ****e and re weld it up nicely and grind so its like new.

 

[AndyStobbs]

There are probably a million diesels out there with a DPF that'll never go into a garage with a DPF issue. If the cars with a DPF get a good run then there wont be an issue. I see cars everyday that a re-genning every 150 miles and the owner is totally unaware.
DPF's are not a bad idea, the miss selling of diesels to school run drivers is the problem, and the publics sheer ignorance and failure to research what they are buying. You wouldn't buy a house without knowing every last thing about it that you could find out, yet people walk into a dealership, get all dewy eyed about the 'low tax on this diesel model sir/madam' and promptly sign upto finance on THE WRONG CAR.

ukracer:

Your limp mode could be anything and its not even the case that a blocked DPF goes into limp mode, more often the first sign its blocked is when the engine can hardly rev up at all.

I don't want to get too O/T but to say DPF's are bad is not true, they are not understood, and are essentially a solution to a problem of our creation by our determination to pay no tax and willingness to believe mpg figures without sitting down to research it.

 

[dunk]

andystobbs, the sprinter i had never had an issue with the dpf, it ran a few hundred miles up and down the motorway every day, no limp modes, no engine management lights, covered over 250,00 miles when i got rid off it, same dpf it had from new, yet mercedes serviceing dept said at first service, you will be more than likely changing the dpf about every 100,000 - 120,000 miles, the truth was those that were on stop start/ daily short runs were the ones who were having new dpf`s fitted at an unbelielable cost, like wise with others i knew that were on short run deliveries, those who were on the motorway runs wer`nt having the dpf problems. I always knew when it was re-genning there was a slight loss of power and a more bassier note to the exhaust, so yes i agree with you diesel cars are miss sold, the modern day diesel needs to run distance and hump weight. When all said and done thou diesel is still a dirty smelly fuel for an engine and will only cost us more trying to clean it