[Nick8375]

Hi all, have been slowly trying to figure this car out. First was a leak at the turbo inlet, which I fixed. Thought that was causing my misfires. Was not. I then started getting code U3003 for “Bad Voltage” I had the battery tested and it was fine. (Note when they tested the battery it turned on normal for the first time, and there were no codes for about 5-10 mins and a stable idle for the first time) I ended up swapping it out what my other car (same battery) hooked it up and it is still misfiring. But now with a smaller selection of codes. P0301 misfire, the code for running too lean, then this U30FO code. I need to go drive it again to make sure but it was random misfires before, especially 1 2 and 3.

Anyone have any suggestions? I was smoke testing the intake system and did not find a leak besides the inlet but after fixing that I was not able to locate any other leaks, and the smoke was filling the glove on the other end of the intake. Any suggestions would be greatly appreciated, thinking about just taking it to the dealer but would really like to avoid those costs.
Redownloading INPA tonight and going to try and read the codes from there. Struggling to operate the software though as there is so much going on.

Car runs and drives still, you can feel the power loss when it misfires. I don't think it is a boost leak as it feels like full boost when it's not missing and running smoothly. but I might be wrong about that honestly. Starts a bit rough at times too

Another thing I noticed at high RPMs or whenever I gas it hard, the fuel gauge will drop all the way down to empty and go back up after a second. At around 5-6k rpms rpms in the manual mode, the hazard lights turn on solid on the dash until you upshift.
Thank you all!