Having not used Torque Pro before, I can't tell you with certainty what features it has. Based off its Google Play store description, it does allow you to log the data from various vehicle sensors and send it to your computer to view in excel. It is immensely helpful when troubleshooting an issue. To see if the sluggishness is caused by timing being pulled, I would check if you can monitor spark advance, knock sensor, intake air temp., and cylinder head temp. data. If you want to go even further, you can make a DIY knock detector by splicing a male audio cable into a knock sensor and plugging it into your computer. Additionally, Russell Lewis said bad catalytic converters will typically glow. You may be able to monitor the inferred cat. temps through the app. However, if they were getting that hot there should be a code thrown as once they go above a certain temp. the vehicle should enter a failsafe mode and run a rich fuel/air mixture. Unfortunately, if what Habbibie said is true and you have clogged cats with no codes, I don't know of a way to test short of replacing them. Possibly there is a way to monitor catalytic convertor flow through the Torque Pro app. In addition to all of this, your issue could just be an exhaust leak. I had a really bad one where the exhaust headers meet the block which caused the car to run horribly. It wasn't noticeable when the engine was cold (running open loop) but once it heated up, timing was being pulled and it was sluggish and awful to drive. There is already a thread on to build a DIY smoke machine but I just hooked up a leaf blower to the exhaust and sprayed soapy water where I thought the leaks were. Sorry this is a bit long but when the only symptom is sluggish acceleration, there are many possibilities. I recommend logging as much data as you can with your app. It will allow us to troubleshoot without guessing or replacing parts.