Paphos People

2005 MK6 Ford Fiesta 1.4 16V

Just over a week ago the idle speed suddenly increased from around 900rpm to 1500rpm. I've tried various things, none of which have cured the problem.

I've thoroughly cleaned the throttle body. I've removed and cleaned the TMAP sensor. I've disconnected the battery to reset the ECU. I've disconnected (what I believe to be) the idle speed control valve. There are no DTC codes showing on the dashboard self test and I don't get any illumination of the engine management light.

Generally the revs stay at about 1500rpm, but occasionally the revs are hunting. Less often, but worryingly, they may be as high as 2500rpm immediately after a cold start.

Can anyone give me any pointers as to what else I could check?

Hubby says if it is a petrol engine, it probably needs the air and fuel mixture screw adjusting. Hope this helps.

Thanks for that, but (I believe) on this car all the fuel management is done electronically via the computer.

This is comon problem ,you are in the right area, have you tried to clean cold idele up valve , on trottel body with water pipes. or a/c idele up swith controled by vacum. Sound like micanical fault hence no fault codes. My be you need a more advance scanner. If you still struggeling my macanic worked for europe car and if familar with this modle.

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