A DIY TDI delete can be a cost-effective solution for a clogged DPF. This article outlines a “poor man’s delete” method, focusing on welding the DPF flange and addressing potential downsides like cooling fan operation and cold weather performance.
A Tdi Delete Tune often involves removing the Diesel Particulate Filter (DPF) and associated components, then reprogramming the engine control unit (ECU). However, professional delete kits and tunes can be expensive. Faced with a $7,000 dealership quote for a DPF replacement, a more budget-conscious approach was taken. Using a $200 MIG welder, the existing DPF flange was reused and welded. The exhaust pipe was then rerouted and dumped under the car.
This DIY delete has been functioning for over three years and 262,000 miles (with the delete performed around 200,000 miles). Fuel economy remains impressive at approximately 45 mpg even at 80 mph. All exhaust sensors, including the wideband, NOx sensor, and exhaust flap, remain in place. The MAF sensor, EGR cooler connector, and EGR valve are unplugged. Performance has noticeably improved compared to when the check engine light was illuminated due to the clogged DPF.
However, this modification has some drawbacks. The cooling fans run constantly while the engine is on and continue to operate for 5-10 minutes after shut down. This constant operation doesn’t lead to overheating, even in 65F weather.
In cold weather (below 31F), maintaining cabin heat at idle can be challenging. A temporary solution is to disconnect the lead cooling fan power line from the fuse box during winter months, or install a toggle switch for more convenient control.
This “poor man’s delete” offers a functional, albeit imperfect, solution for those seeking a budget-friendly alternative to expensive DPF repairs or replacements. While it bypasses the need for a traditional TDI delete tune, it’s crucial to understand the potential downsides and implement workarounds like the cooling fan disconnect for optimal performance in varying weather conditions. This method provides a temporary fix and allows the vehicle to remain operational without a significant financial investment.
