My goal here is to avoid blindly buying a new or used unit since I don't know it's broken for sure, which is why I was asking about a swap between two cars I already have next to each other in my possession. I don't have the VINs here with me at work, but they're both 2.5L turbo T5's. The C30 is the...

I have a 2007 C70 with 180k on it that has been sitting in the carport since octoberish. Started running it again this week and noticed she loses power briefly for a split second at about 2.2k rpms - like someone pushing down the clutch for a second. The car doesn't really break stride, but you feel...