As title says really, gave my throttle body a good clean due to engine sounding like it was going to die on startups, and was coked up just as much as the photos in the how 2, the EGR was pretty clean so left that alone.

After putting it all back together, I started the car for the first time and heard a big clunk! When I switched off and started again a few times it was ok, maybe one of my sockets or something stuck down there lol, or would WD40 create a bang in the cylinder as it burns off?

Anyhows, now when I start the car, the spanner light comes on for a few seconds then goes out, is this normal? It never done it before