I've got a Subaru Forester '02 2.5L that I push kind of hard off road on New Zealand beaches.
I had a near dead battery recently so bought a new one but on replacing it I must have wiped the ECU because it has no clue how to run the engine now.
It runs (just) but is super rich, a strong smell of unburnt petrol and is in a constant state of almost stalling. If I blip the accelerator it will either kill the engine or possibly backfire/misfire.
Watch the video, it's some pretty strange stuff https://www.youtube.com/watch?v=PooAiOYusFE
Here's what I know is wrong with it:
- 0₂ sensor broken (I believe it's rear but haven't confirmed )
And what I have tried:
- Tried doing another ECU reset, slightly better results but still same issues
- Replaced the MAP sensor with another used one (Hitachi boost sensor PS60-01) , no difference
- Listened/felt for vacuum leaks, didn't do a rigorous job by any means but couldn't find anything obvious
Anyone seen anything like this and have ideas on what to do next?