A Diesel Particulate Filter (DPF) can be a costly component to replace when it fails. In this article, we explore a budget-friendly DIY solution for a Volkswagen Dpf Delete, focusing on a personal experience with a 2009 model. This approach involves welding the DPF housing shut and addressing potential side effects.
A DIY DPF delete involved welding the existing DPF flange shut and reusing the exhaust pipe, essentially creating a straight pipe. All exhaust sensors, including the wideband, NOx sensor, and exhaust flap sensor, remained in place. Additionally, the MAF sensor, EGR cooler connector, and EGR valve were unplugged. This setup has been running for over three years and 262,000 miles, achieving approximately 45 mpg at 80 mph.
While performance improved significantly compared to when the check engine light was on, some downsides emerged. The cooling fans run continuously while the engine is on and for 5-10 minutes after shut down. This constant operation causes issues in winter, particularly below 31°F, where the engine struggles to maintain warmth at idle. A temporary solution involved disconnecting the lead cooling fan power line from the fuse box during winter months to prevent excessive heat loss. Even on warmer days reaching 65°F, no overheating issues occurred.
This method, dubbed a “Poor Man’s Delete,” offers a cost-effective alternative to expensive DPF replacement, especially when faced with a $7,000 dealership quote. While it’s crucial to acknowledge that this approach might not be suitable for everyone and may have legal implications depending on local regulations, it provided a functional solution in this specific situation. This personal experience demonstrates a successful long-term application of a DIY DPF delete on a high-mileage Volkswagen. Remember that modifying emissions systems can have legal ramifications and might not be recommended by the manufacturer. Always consult with a qualified mechanic and research local regulations before undertaking such modifications.
