AHA! You are all correct - I attributed the big wheels to the real problems I had going up hill - now I have found the real problem!
discovered my air filter had collapsed in on itself - so when the engine was screaming for air - it wasn't;t...
Thank you so much for this post. I have just experienced a remarkably similar symptom, and thought I had fried my ECU. I was just about to post a cry for help when I read your post. I was planning a green laning trip round Wales this weekend -...