Just got a Ford focus mark 1 (2002).

Has a really bad high idle problem. Whenever I stop (junctions,lights etc.) engine surges to about 2000 revs, then after about 5 seconds drops to 1000 but still sounds too loud and too racey.

Also when crawling along in traffic jams I have to keep jabbing the brakes, stop me crashing in to the car inn front and when I release brakes car accelerates itself!

I've replaced throttle position sensor and cleaned out idle air control valve (reset ECU each time). No OBD fault codes.

Weird thing is, if I put front and rear screen heaters on, revs drop to 750 which is spot on but I can't drive around with my screen heaters on all the time

Any ideas please?

Cheers

Andy

 

If you dont have any air leaks you might need a software update mate we have about 4 Focus do this ECM reflash @ Ford sorted it after some of the other garages replaced TPS, IAV ect