TUNING MY AUDI S5 AFTER IT LOST 100BHP!
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We lost over 100BHP on the Audi S5 V8 after the walnut blast so now it was time to find the problem and try to gain back the missing power. I also ran into another problem aswell! Get your Audi RS5 tickets here bit.ly To win one of the other 150 cars in the line-up including a large selection of Audis head here bit.ly Follow Mallory Performance - @MalloryPerformance @malloryperformance
Follow Me - @matarmstrongbmx @matarmstrongbmx
The video centers on diagnosing and recovering power loss on an Audi S5 that reportedly lost about 100 horsepower after a walnut blast. The creator begins by recapping the power loss issue and explains that the team will investigate at Mallory Performance to identify the root cause, with the aim of restoring the missing power. Early on, they test the car on a dyno and discuss potential culprits, including sensor readings and air flow into the engine. A key moment is the decision to perform a smoke test to check for intake leaks, which reveals a small PCV valve leak that could be hindering engine efficiency. The subsequent steps involve addressing that leak, rechecking dyno results, and evaluating whether the problem shifts towards coil packs or injector timing. The overall arc shows a methodical diagnostic approach, using live data and visual inspection to guide part replacements and tuning decisions. The video ends with a test drive that demonstrates improved throttle response and confirms that the vehicle is moving in the right direction, albeit with ongoing adjustments to maximize power while also dealing with wrap and cosmetic issues caused by previous oil leaks. The presenter teases further modifications in a forthcoming video, promising a detailed reveal of all the installed mods and additional tuning steps. The blend of hands-on mechanical work, live dyno feedback, and community engagement forms the core value, highlighting both the technical process and the personable, iterative journey of tuning a modern V8 Audi.
Topics · Autos & Vehicles · Technology & Science · DIY & Tinkering · Automotive Tuning
Questions answered
- What was the initial diagnostic step to identify the power loss on the Audi S5?
- The team began with a dyno test to establish current power output and then performed a smoke test to check for intake leaks, which helped confirm or rule out air leaks as a cause.
- What issue was found during the smoke test and how was it addressed?
- A small PCV valve leak was detected during the smoke test. It was addressed by cleaning and reseating the valve to seal the leak, with the goal of restoring proper airflow.
- Why did the team consider coil packs as a potential culprit after initial fixes?
- Despite fixing the map sensor and PCV leak, the car still showed misfires and power loss on one or more cylinders, leading them to suspect coil packs and ignition timing as possible causes and to test replacing them.
- What is the expected outcome of the upcoming changes, and what will be explored in the next video?
- The immediate goal is to regain horsepower and improve throttle response. The next video will likely review all installed mods and perform further tuning, sharing detailed results and outcomes.