Dpf delete

Why get it deleted?

They cause problems.

A DPF doesn't stop smoke, it limits the amount of soot exiting the exhaust. I've had my DPF gutted for 8 months and there's been no smell/fumes, no EML and the car drives great, the only difference is it'll throw out a bit of black smoke under hard acceleration.

As User1998 said, done correctly, There will be very little smoke. Get it done by cowboys and the car will drive like sh1t and be covering the road in smog.

And the DPF filter is gutted, box is in place, cannot be spotted while looking under the car.

Cars can smoke for a number of reasons. White, Blue and even black that isn't DPF related.

Smoke is translucent, you can't block a filter with Smoke, it's soot i.e byproducts of diesel combustion.

I got my DPF gutted and there wasn't even anything wrong with it, just wanted the driveability benefits and no headaches from it going wrong. EGR is bypassed on my car too :)

The black smoke is soot - that is microscopic carbon particles produced by incomplete burning of the diesel.

My point exactly. And even that is very relaxed. It's an opacity test, it tests for thick smoke which can be either soot or unburnt diesel or a mix of both.

Tbf that's nonsense. I know various vehicles with DPF stripped out. The are absolutely toxic. It has a huge impact in what comes out the tail.

You only have to sit behind a stripped diesel in traffic for 10 seconds to get a waft of it.

Very common but it's nonsense to say it has no impact.

In most if not all cases gutting the DPF also means removing the catalytic converter, because they are in the same unit.

Run a damp rag on the inside of the exhaust pipe before the test. That's the problem, it's hard to prove unless it's obviously missing, if the DPF case is there then it's simply too difficult to prove it's been gutted. They need to update the emission test limits to properly test the diesels, just as they test the petrol engines.

So OP, get a petrol engined car is the answer.

A DPF absolutely stops black soot what many including yourself consider as smoke. Issue is NCT don't place the car under enough load for it to be more apparent or actually measure emissions during testing. It's not difficult to check for missing DPF from a testing perspective and I'd argue it should come with a very hefty fine when found out both for the owner of car and garage that facilitate this.

what do you think the smoke is?

It's probably one of those things where you are liable even when you're not guilty.

Source?

I’d like to see the law that states a private seller must inform the new owner of any modifications done to the car they are selling. I’d also like to see the law that states compensation is owed if they fail to do so. And I wonder has it ever been enforced?

Also the first line of the article states that a DPF removal is an NCT failure which in reality simply isn’t true. Nobody goes chopping the whole DPF off, only the inside is removed to avoid detection. So I wouldn’t trust much else of the article.

Can you show me the legislation that states that? Are you saying its illegal to sell a car with no tax or NCT then? Or a car with bald tyres? Does that mean I was engaging in illegal activity buying damaged cars and putting them back on the road?

Don’t get me wrong I hate diesel cars and all that comes with them but I don’t think what your saying is factually correct.

Removing DPF and EGR but leaving cat converter in place massively increase the life span of a diesel engine. I have been running mine since 2016. Euro 6 engine, and there is zero smoke coming outof the exhaust, especially when dpf delete is done on newer vehicles. MPG is improved, car temps run a lot lower, no need for high 800c regens, clogged egr and dpfs. Its a no brainer if the job is done right

I agree. I mistakenly took mine out, replaced it with a downpipe and held onto the dpf. Fumes were terrible and I sold the car because of it as the job to remove the dpf was so hideous I just couldn't face putting it back on.

Car was sold with the dpf and new owner intended to put it back on.