Infernal01

Ford Focus 1.6 gas 2001.

I've had this problem for 2 years now, every winter it's the same thing, whenever the car is running and i press the clutch, the revs go up to 2000 and stay there until the car comes to a complete halt, at which point, it drops down to normal 1000.

Oh, but it gets better, if the engine is warm enough and i turn off the engine and then turn it back on, the revs go up to 3000. It's awful.

I've been to 3 car services, one of them being a Ford house. They all say it's because of the idle air control valve (IACV) or throttle position sensor (TPS).

I've already changed 3 TPS's and 4 IACV's all of them original Ford parts and although the problem WAS fixed, it always came back after 2-3 weeks.

The guys at the Ford told me they don't know what else to do, can you believe that ?

Tests show nothing, i don't know what else to do... it just seems unreal.

R.S.LOGAN

Have had a few with similar problem which was caused by the power steering pressure sensor switch / wiring . A quick look wouldn't go wrong , nothing to lose and wont cost you to check .

Infernal01

Could you tell me what and where exactly is that ?

Thanks.

R.S.LOGAN

If I remember correctly the switch on that year was fitted on the power steering pump but could be wrong . When the power steering is under load and the engine revs drop , this lets the ECU know it has to increase revs to keep engine from stalling . Could be some other fault , but worth checking .

p.s
On some cars they have a sensor mounted in the high pressure PS line / pipe

Infernal01

Hmm, seems kinda wierd because it doesn't matter if i move the steering wheel, the revs go up and stay there until the car stops. Anyway, i'll give it a try.

Also, i've read somewhere that the EGR might be the problem, is that possible ? And if yes, how can i tell ?

Thank you.

djzx3

Disconnect the EGR valve, if it gets better, then that was the problem.

But it might not be either of what me and LOGAN are saying, it might be a TB problem, or Air idle control valve.

But try this stuff and get back to us.

__________________
2000 focus wagon 2.0l DOHC Zetec
04 Subaru WRX,:)



How-to directory.

Ford focus DTC codes.

Ford= First on race day.

R.S.LOGAN

Could also check wiring / harness / connector to TPS for water or dampness ingress.

Infernal01

Quick questions, my car runs on petrol, does it have an EGR / DPFE sensor ?

R.S.LOGAN

This might help you ,

DPFE Sensor and EGR Information - Focus Hacks

Infernal01

I've read that, but i just don't see the sensor or the EGR in my car :)
Here's a picture ImageShack® - Online Photo and Video Hosting

Anyway, tomorrow i'm gonna go to a service and ask them to check.