Hi Guys - I'm brand new here @ passionford.

I wonder if the knowledgeable members can help me out?

Just over a week ago the idle speed on my 2005 1.4 16V MK6 Fiesta 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?

Obviously, I could take it to the garage but I'm absolutely skint at the moment and I'm desperate for a remedial fix for the next few weeks.