Does the glove inflate or just stay limp?

If it inflates, you should use the interim catch can solution until you can fix it, so you don’t blow seals

Cam seals 100 EU
Main engine seal. 1000 EU

Here's where an affordable (cheaper) code reader can speed things along. A misfiring coil will generate a P0300 through P0305 code. The 300 would mean "random misfire'. 301-305 would point to misfires in cylinders 1-5 respectively. I'd bet buying (or borrowing) a cheap reader would be less cost...