This resets the readiness bits and they check them again. If the still say "OK" they know the car is lying to them and the readiness bits are "hard wired" - and you fail again. In short, there is a chance that a DPF delete and Malone tune will pass an OBDII only readiness check. However, there is also a chance that it will fail big time. DPF volume, and threshold filterpressuredropmeasurement, amongst others [23]. The vehicle operator prefers the DPF maintain good performance for the full-engine lifetime. Therefore, it is beneficial to have an accurate measure of how much ash is removed from the DPF during filter servic-ing,relativeto the estimate ash exposure, in order to schedule Some only gut out the DPF and leave the catalytic convertor alone. The catalytic convertor part is made of metal honeycomb and is not ceramic like the DPF. You can remove the exhaust from the back of the DPF and again, with the engine and DPF cold, insert a snake camera through the exhaust into the DPF and have a look around. I've heard both to leave them and remove them. majoob said: My mechanic will delete the DPF but say they don't physically modify/delete/block the EGR valve that it would cause too much pressure build up somewhere. They said the new programming reduces the EGR use, but still allows it to open when needed. The Diesel Brothers—a collective nickname for Discovery Channel’s truck-obsessed super polluter television show, David “Heavy D” Sparks, Joshua Stuart, Keaton Hoskins, and David “Diesel Dave” Kiley—have been ordered by a Utah judge to pay over $850,000 in fines for violation of the Clean Air jalopnik.com. Robert watson. New Member. 10 Aug 2020. #9. The sound of the whistle hasn’t changed since I bought the van, it just all of a sudden lost power engine management an the coil light came on an on the computer it read dpf spot fault. That’s why we removed the dpf an had it mapped, but still no power an now there’s no warning lights. as said,,when idling you may smell a little derv fume and the tips will be sooty..but only real way will be to get it in the air and take under trays off,either its been removed or gutted,,either way you will be able to tell,unless the dpf box has been welded up very very neatly.but i doubt it looks as neat as when left factoryalso if you have not had any regen problems or even a regen Agreed how right you are.I believe the next tranche of regulations from the EU will test for increase in bhp and DPF removal failure to comply will be a failure easy to test but not easy to retrofit.The companies that removed the DPF will have another good business refitting them. NjsN.

how can you tell if a dpf has been removed