F10 520d DPF and the Fall of the Cat

[KnightNewscast]

Hi,

A drivetrain problem and white smoke from the exhaust were symptoms of a strong pull on the highway. There was what seemed like a large vacuum leak, a braided line that had popped off the side of the engine block, and white powder (presumably cat matrix) covering the exhaust.

After having the stuck-open thermostat fixed (about 12 months ago), the temperature in the automobile returned to its usual range.

I had the car remapped around seven months ago, and everything was running smoothly until the most recent breakdown.

Could the remap hastened the dpf meltdown since it was already jammed from cold running before I got it?

Any information or suggestions regarding this would be much appreciated!

Much obliged.

[Starat]

One would have expected a notification in the event that the dpf was banned.

[KnightNewscast]

Yeah, I didn't see any dpf problem warning lights. A couple of months ago, I did have a code for excessive exhaust gas temperature. I simply drove it over without looking into it because I am not very vehicle smart.

[Anabroo]

It turns out that even a DPF can experience a thermal overload, transforming them into a chalk-like substance. A forum sponsor named Jason used to get customers bringing in DPFs that had failed, and he said that all of those cases were due to customers doing high rev regenerations and cooking the DPF.

[Finestey]

whom did the remapping?

[KnightNewscast]

MacG won the Derby at Barrow. By the time I finished the map, the ecu tune had gone well, however the tcu map had a problem.

According to what I was told, they were able to remove the file but were unable to return it to the tcu. So it was inaccessible for three weeks.

The gears have been functioning properly ever since they got it working again.

The numbers on the sports display indicate more than 400 nm of torque, which wouldn't be there if it were stock.

[Markwe]

This occurred, and it was entirely avoidable because the EGT defect was disregarded.

Your EGT is to blame since it would have dumped extra fuel into the dpf to raise its temperature because it believed the dpf was operating too cool for regeneration to take place. The dpf becomes overheated because of this. The white stuff you're seeing is really the result of the dpf physically incinerating the trash it contains when temperatures reach 800 degrees or above. This causes the trash to condense within the filter, which is now the source of your problem.

While egts on gas-powered vehicles are usually not a big deal, on newer diesels, they can cause major problems.

[KnightNewscast]

Indeed, I see your point. Is it possible that a faulty remap or perhaps a compromised sensor is to blame for the high egt problem?

[Markwe]

Poor overfueling caused by a terrible remap can lead to EGTT failure. These days, it seems like everyone provides remapping services, but very few of them are qualified. The fact that the module was bricked ought to have served as a huge red flag.

Tuning very stressed engines is an entirely new animal; nevertheless, my vehicles have the egt's programmed out and I use gauge pods to monitor them.

[Markwe]

😁