2.0 TDI exhaust

[Greg Roles]

And I'm one of them!

Then again what a non DPF TDI puts out compared to an old 4x4 is nothing....it's those old guys who obviously have dirty injectors that pump out gallons that really bug me....especially if I'm on the pushie...YUCK!

[gregozedobe]

But unfortunately ALL diesels get "tarred with the same brush", and it is such a noticeable pollution in some cases. Although I have seen a few crappy petrol cars that are so worn out thet they produce nearly as much smoke.

I just wish there were more cops on the road (and roadworthy inspectors). There are so many obviously unroadworthy vehicles out there that they would actually make money from the exercise, as well as making the roads safer for the rest of us (Jeez, showing my age there ! ).

[Greg Roles]

You'll find the gov will have a "smokey vehicle hotline" where you can dob people in and they get a letter, and on their third strike they have to report for an inspection. I have no problem narking in the very bad ones you see every few weeks, it's only a letter, but hey it's something.

Guess I'll have to keep my DPF lest I get narked!

[Greg Roles]

But unfortunately ALL diesels get "tarred with the same brush", and it is such a noticeable pollution in some cases. Although I have seen a few crappy petrol cars that are so worn out thet they produce nearly as much smoke.

I just wish there were more cops on the road (and roadworthy inspectors). There are so many obviously unroadworthy vehicles out there that they would actually make money from the exercise, as well as making the roads safer for the rest of us (Jeez, showing my age there ! ).

Speed camera has a much higher profit margin, doesn't take sickies, and works for pittance!

Now back to TDI exhausts! ( you're gonna get me in trouble mate! )

[gregozedobe]

Now back to TDI exhausts! ( you're gonna get me in trouble mate! )

Naah, we've been ON Topic the whole time

TDI exhausts with DPF = no soot= no problems with the wider motoring public (but potentially less power if you want to remap)

TDI exhaust without DPF = soot = possible problems with the wider motoring public (but potentially more power if you want to remap)

[comfortline]

That's a great synopsis. But does the level of smoke equate to that of any Mitsubishi with 100,000 km on the clock?

No I don't think so!

[gregozedobe]

A lot depends on the state of wear and tune of the individual vehicle (and some are particularly poorly maintained).

Soot is simply unburnt diesel fuel. This is mostly caused by worn/clogged injectors not atomising the fuel droplets properly, but some "tuners" simply adjust up the fuel supply adjustment on the injector pump, and if there is insufficient air to burn all the fuel then you will also get more soot. If taken to extremes this can also raise combustion temps to the point of mechanical failure.

I agree that most of the truly awful producers of great big black clouds of soot need some serious attention to their injectors, rather than being a modern TDI sans DPF.

[Vicbitter]

Whiteish/grey smoke ok?

[gregozedobe]

Not usually.

Unless it is only condensation from a cold motor and cold exhaust when it is OK (it should go away when everything warms up to normal operating temperatures).

If it is burning lots of oil then not so good (could be rings, valve seals or turbo problems)

If it is a petrol then it may be over-fuelling by a fairly large margin (but this is the diesel section, so I'm assuming you aren't talking about a petrol engine).

[Vicbitter]

only when i give it a bit, and then only sometimes... (done 4,500km)

[gregozedobe]

only when i give it a bit, and then only sometimes... (done 4,500km)

Any particular pattern to the "sometimes" ? Eg if it only ever happens when you take off hard after idling for a while (eg at lights) then it might be valve seals.

Is your engine's performance (power) consistent and OK, or does it vary or is it a bit slower than other cars with the same engine and gearbox ?

Does it use any oil, and does it use more around town or in highway running ?

[Vicbitter]

I noticed after a few days of revving past 3,000 in gear shifts, seems to be less smoke now. Maybe just needed a cleanout!