If you're ever in the west valley area (SF valley) I can check it out for you. I can also recommend a local mechanic in santa clarita (not that local for you)
You already spent 3k on it? wow. Need a detailed list on what was done.
Here's what I'd like you to do. Start the car up and take a picture of the dashboard so we can see all the lights that are on. Also take a photo of the engine.
We can go from there.