If you have a diesel truck that you've deleted, you may be wondering if you can still pass your emissions test. The answer is maybe. It depends on a few factors, including the type of delete kit you have installed and the state you live in. Some states are more lenient when it comes to emissions testing for deleted trucks, while others are more strict.
If you have a DPF (diesel particulate filter) delete kit, you will likely not pass your emissions test because this type of kit completely removes the DPF, which is responsible for trapping particulate matter (soot) from the exhaust. Without the DPF, there's nothing to trap the soot, so it will be emitted into the air. This is why DPF delete kits are illegal in many states.
If you have an EGR (exhaust gas recirculation) delete kit, you may be able to pass your emissions test, depending on the state you live in. EGR delete kits don't remove the DPF, but they do disable the EGR system, which can reduce soot emissions. However, because the EGR system is also responsible for reducing NOx emissions, disabling it can actually cause NOx emissions to increase. This is why some states don't allow EGR delete kits.
Ultimately, it's up to you to check with your state's emissions testing requirements to see if you can pass with a deleted truck. If you