2012 no DPF?

[mgermasi]

Is it rue that for the 2012 production Nissan decide to remove the bloody DPF?
1)-If it is so why is it illegal for me to remove it?
2)-What is the reason for removing it?
3)-If Nissan thought the DPF is not good or beneficial to the car or to the environment, aren't we entitle for an update of the product?
What are your thoughts?

 

[Old.Tony]

It is true.

1) The new model has a redesigned head and new fuel map so its emissions are reduced compared to yours
2) See 1)
3) You'd need to change head & ECU - if they're compatible - and the turbo actuator as well, since that was upgraded. It's not a cheap exercise.

 

[Krankin]

otherwise it is illegal to remove the DPF.

 

[user 10312]

Mine has no DPF and it's a September 2011 build.



___________________________
2011 ST-X King Cab

 

[Old.Tony]

I think it was the latter half of 2010 that they tossed the DPFs - when they went to the 140kW motor.

 

[mgermasi]

Old.Tony
does it means I could install a 2010 ecu on my car(2011 RX)?
I spent the last few nights reading the post where you Bosshog & apcconstruction did all those experiments. I really would like to eliminate the DPF and its regen cycle (and alarms) from my car.
Thanks mate

 

[FatBoy89]

I think it was the latter half of 2010 that they tossed the DPFs - when they went to the 140kW motor.

Some still had it mate... For some reason somethin like 1-10 still had a DPF.

 

[Old.Tony]

Old.Tony
does it means I could install a 2010 ecu on my car(2011 RX)?
I spent the last few nights reading the post where you Bosshog & apcconstruction did all those experiments. I really would like to eliminate the DPF and its regen cycle (and alarms) from my car.
Thanks mate

Does your 2011 RX have a DPF? I thought they were only on the STX autos. I've got some doubts that the ECU would be a straight plug-in. The motors and their outputs are different, if I recall correctly. This will mean that injector management will be different - it's not something I'd try.

In the end, we didn't really resolve a lot, except that in order to remove the DPF, you need to ensure that your vehicle is NOT trying to do a burn or a regen (so, catch it just after a burn, then install the delete pipe from ChipIt). This way the sensors never register a difference and the ECU never sees a need to do anything about it.

The ECU will still pump a little fuel into the exhaust for the CAT - diesel is used as the reductant in our catalytic converters.

 

[Old.Tony]

Some still had it mate... For some reason somethin like 1-10 still had a DPF.

Word on the vine is that ALL diesels will soon have DPFs fitted.

In Europe, they've done some fancy testing that proves if you breathe in a lot of diesel soot, you will get cancer of the brain and your left testicle will fall off, bounce off a fence into a church and cause the local parish priest to choke to death.

Personally I'm not sitting behind my car while I'm driving it and if I did connect my exhaust to the cabin air intake I don't think I'd be too concerned about the friggin' priest.

 

[KraftyPg]

In Europe, they've done some fancy testing that proves if you breathe in a lot of diesel soot, you will get cancer of the brain and your left testicle will fall off, bounce off a fence into a church and cause the local parish priest to choke to death.

Now you are just stretching the ******** for ********* sake, the priest was standing on the corner there was no church in the original study and you know it!

 

[mgermasi]

Word on the vine is that ALL diesels will soon have DPFs fitted.

In Europe, they've done some fancy testing that proves if you breathe in a lot of diesel soot, you will get cancer of the brain and your left testicle will fall off, bounce off a fence into a church and cause the local parish priest to choke to death.

Personally I'm not sitting behind my car while I'm driving it and if I did connect my exhaust to the cabin air intake I don't think I'd be too concerned about the friggin' priest.

Sorry Old.Tony I was imported here from Italy 10 years ago (100% legal, no boat) and from my family and friends I hear that in Europe they actually removing the dpf as it breaks the particles in such small parts that the human body can actually assimilate them better once in the lungs.
Hence the 2012 models don't have them anymore.

 

[mgermasi]

Does your 2011 RX have a DPF? I thought they were only on the STX autos. I've got some doubts that the ECU would be a straight plug-in. The motors and their outputs are different, if I recall correctly. This will mean that injector management will be different - it's not something I'd try.

In the end, we didn't really resolve a lot, except that in order to remove the DPF, you need to ensure that your vehicle is NOT trying to do a burn or a regen (so, catch it just after a burn, then install the delete pipe from ChipIt). This way the sensors never register a difference and the ECU never sees a need to do anything about it.

The ECU will still pump a little fuel into the exhaust for the CAT - diesel is used as the reductant in our catalytic converters.

Ok, than please correct me if I'm wrong,
1)- Would it be correct to Bridge the signal back to the ecu for pressure sensors (before and after dpf) and for the temperature sensors (before and after dpf) so that the ecu would read 0 delta and won't start the regen cycle?
2)- Accordingly with northside4x4 in thread "Diesel Chips / Diesel Tuning - How Its Done" the UNICHIP has timing control which means "Chips that can adjust injection timing: Plug into the crank angle sensor" which means we could use this kind of chip to avoid "The ECU will still pump a little fuel into the exhaust for the CAT - diesel is used as the reductant in our catalytic converters." by remove (ignore) the exhaust-stroke-injection"
3)- Are we sure that the ECU is looking at ONLY the delta of the pressure and temperature sensors and not something like "for 10K Km without DPF regen cycle = DPF Error"?
Sure there must be a way out of this bloody stupid filter......w/o buyind a new car of course.
Thanks

 

[Old.Tony]

Sorry Old.Tony I was imported here from Italy 10 years ago (100% legal, no boat) and from my family and friends I hear that in Europe they actually removing the dpf as it breaks the particles in such small parts that the human body can actually assimilate them better once in the lungs.
Hence the 2012 models don't have them anymore.

I think there are two camps on it, both loudly spruiking the benefits of their approach. The info I got came from some organisation like the EPA in Germany.

Whether they're right, wishful or just extra-loud about their personal opinions is something we'll find out eventually!

 

[Old.Tony]

Ok, than please correct me if I'm wrong,
1)- Would it be correct to Bridge the signal back to the ecu for pressure sensors (before and after dpf) and for the temperature sensors (before and after dpf) so that the ecu would read 0 delta and won't start the regen cycle?
2)- Accordingly with northside4x4 in thread "Diesel Chips / Diesel Tuning - How Its Done" the UNICHIP has timing control which means "Chips that can adjust injection timing: Plug into the crank angle sensor" which means we could use this kind of chip to avoid "The ECU will still pump a little fuel into the exhaust for the CAT - diesel is used as the reductant in our catalytic converters." by remove (ignore) the exhaust-stroke-injection"
3)- Are we sure that the ECU is looking at ONLY the delta of the pressure and temperature sensors and not something like "for 10K Km without DPF regen cycle = DPF Error"?
Sure there must be a way out of this bloody stupid filter......w/o buyind a new car of course.
Thanks

I don't think the pressure sensors are used for any detection routines. One guy put the two sensors into each end of a piece of pipe/hose and said that worked for him. It's my understanding that they only - exclusively - measure the pressure and the ECU measures the difference and determines the need for a regen based on that.

The sensor that causes problems with the ECU's detection is the HO2S (Heated Oxygen Sensor). The ECU modulates the fuel rate by varying the fuel rail pressure by small amounts. This variation should appear in the exhaust stream as an inverted variation in the available oxygen. If this isn't detected by the ECU, the car goes into limp mode.

As for the CAT, you can remove the CAT itself but removing the exhaust stroke injection would probably require a rewrite of the ECU. The chips that look at the CAS output only vary the injection timing, so they can advance it or retard it a little as needed, but they don't remove injector openings as far as I'm aware. You can get your ECU reprogrammed but as soon as Nissan get their hands on the car they'll reflash it anyway.

I suppose you could build box that plugs into the CAS and each injector that purely examines the signals to determine when each cylinder is NOT nearing its necessary injection time and for all other times, ignore any injector signal. It would have to be fast, the electrics would have to be made with excellent conductors with a high Vpp.

The ECU doesn't bother with exhaust temperature, there's no sensor for that or we'd just read it instead of buying our own EGT gauges. It DOES look at the distance travelled but that's in conjunction with the pressure differential and in this case it's something I think they got right - if the vehicle has travelled a certain distance the ECU re-examines the pressure readings. If they're the same or close (within a certain tolerance level, I guess) ... no action needed.