MR2 Engine Smoke Power Loss

Dude, that sounds familiar. I had something similar happen with my MR2. Have you checked your ventilation system, specifically the PCV valve? A malfunction there can cause all sorts of weirdness with emissions and engine performance. Is the smoke bluish or more black/grey?

PCV valve, huh? I'm no expert, but I googled it and it seems connected to the crankcase ventilation. Where is it and how would I diagnose if it is broken? What do you mean, bluish or black/grey smoke? Sorry if I sound ignorant...

Okay, no worries! Knowing the smoke color helps narrow things down – bluish often means oil burning, while black/grey suggests fuel issues. Since you're seeing a check engine light and power loss and smoke, and I had a similar combo, I'd really lean toward the crankcase ventilation valve being defective. Honestly, though, diagnosing it properly can be tricky without the right tools. I ended up just taking mine to a workshop to fix it, as I didn't want make it worse. It's probably the best option unless you are an experte.

Thanks a lot! Seeing it could be the crankcase ventilation, I brought the car to a workshop. Turns out it really was a defective PCV valve! 360€ later it's fixed, but at least I know what was up with it. I really appreciate the help!