Hi all,
Had to slow down from 70 when the traffic on the motorway stopped, normally I can judge how hard to press the brakes to stop in the right place but this time I found I had to brake harder towards the end. When stopped I noticed that the engine was "idling" at 2k5 revs.
It went away after a few minutes and hasn't come back yet (this was Sunday). I've seen other Fiesta's idle fast when the battery is low but that's not it this time. No fault codes recorded by the ECU.
I'm thinking TPS atm but can't see how it would cause it; if the TPS incorrectly showed a slightly open throttle wouldn't it close the IAC and feed fuel, only to starve due to lack of air? Or does the IAC remain open unless it's overrunning?
Hmm.
Peter.