Still having a problem with the idle speed on my 2000 Fiesta 1.25 Zetec. When I come to a halt the revs stay at around 1500 for a couple of seconds before dropping back to around 900. I was told that it was probably a idle air control valve which should be replaced. This made sense and when I removed it the mating face was corroded so I ordered a new one and fitted it. Made no difference at all. Was then told to re-set the ECU by disconnecting the battery for a few hours. Did this but it made no difference either. I've now been told that it may be a faulty throttle position sensor as this is common in both the Fiesta and Ka. However I don't want to spend another £60 unless I know for sure that it is faulty. Is there some way I can test it bearing in mind that I'm not too technical. Was told the following by a crypton tuning guy who says he got the tip from Ford. He said to remove the multiplug from the throttle position sensor and then to remove the socket that the multiplug goes into which is mounted onto the side of the TPS. He then said to drill out the two mounting holes just to the next size up and re-mount everything. According to him this may solve the problem! Does this make any sense to anyone? Thanks for any ideas.
Alex