Last night I arrived home after a 35 mile drive home in my Focus 2.0 TDCi. I had a quick bite to eat and went back out again. When I started the engine, it sounded a bit rough and I noticed it was idling low (600rpm as opposed to the normal 800rpm). I gave it a dab of throttle but nothing happened. It was like the throttle cable had snapped. The throttle could be pressed to the floor and the revs stayed at 600rpm.
I had a look under the bonnet and couldn't even figure out where the cable went. The car is fairly new to me and I haven't had time to figure out where everything is. I know that the engine is a PSA unit.
I stopped the engine and re-started it and it was fine. It was fine again this morning. Anyone have any idea why it wouldn't respond to the throttle last night?