I was poking around the car looking for issues as Blackmist felt I had something causing it to run richer than it should even without a tune and found three potential issues. The first clamp after the MAF was dead loose, one plug wire on the coil pack was only like 7/8 on and I had a leak from one EGR gasket. All potential issues I suppose.
After a test drive to clean the plugs it definitely is running better. Still throws P0300 it it idles more than about a minute which is to be expected.
I also found the AC is now not working. The compressor clutch does not engage so either there’s a leak in the system or there’s and issue with the compressor/clutch/wiring.
I also have a drip from the transaxle which is like the drain, will have to replace the crush washers again it looks like.
I’m not happy with the new Royal Purple transaxle fluid I put in, it doesn’t feel quite as smooth and I’ve had issues with it jumping out of first gear from a standstill when it’s hot. Likely going back to GM fluid as per their second recommendation. I also found the receipts for the built transaxle and it was over $5k CAD all in and installed.