6.7 cummins mass air flow sensor problems

This helps clean exhaust gases, but it doesn’t capture these solid particulates. The particulates can stick to your lungs and are carcinogens.ĭiesel engines have oxidation catalysts, called DOCs, that function like normal catalytic converters. These small, solid particles contain hundreds of different chemicals in them and are harmful to human health. Burning diesel fuel releases microscopic solid particles into the exhaust gas, commonly referred to as diesel particulates. What is a 6.7 Cummins DPF System?ĭPF is a diesel particulate filter. If you want to read up on the various other systems, check out our guide on all 6.7 Cummins emissions systems. We’ll discuss what the system is, how it reduces emissions, and the pros and cons of deleting the DPF system. This guide is going to specifically cover the DPF system. Lastly, when it does fail it costs about $2k-$3k to replace. Additionally, since it is part of the exhaust system it creates a lot of post-turbo backpressure which decreases turbo reliability and restricts performance. As we discussed in our 6.7 Cummins common problems guide, the DPF system is prone to clogging. While the diesel particulate filter and all the other emissions equipment is very good at reducing emissions, it also has its shortcomings. The DPF system has hung around since then and is still used in current Cummins engines. One of the new emissions systems added to the 6.7 Cummins is a diesel particulate filter, or DPF system. One of the reasons the old diesels remain so popular and expensive today is because they don’t have any of these modern emissions systems which tend to be problematic and very expensive to repair. Since then, emissions regulations have continued to tighten and various new systems have been added to the 6.7 Cummins. The 6.7 Cummins diesel engine was introduced in 2007.5 as a replacement to the 5.9L due to tightening emissions regulations.

6.7 cummins mass air flow sensor problems