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Old 03-15-2012, 15:45   #1 (permalink)
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Exclamation High revs when idle, no one can figure out the problem :(

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.
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Old 03-15-2012, 16:13   #2 (permalink)
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Re: High revs when idle, no one can figure out the problem :(

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 .
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Old 03-15-2012, 16:38   #3 (permalink)
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Re: High revs when idle, no one can figure out the problem :(

Could you tell me what and where exactly is that ?

Thanks.
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Old 03-15-2012, 17:43   #4 (permalink)
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Re: High revs when idle, no one can figure out the problem :(

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
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Old 03-16-2012, 02:50   #5 (permalink)
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Re: High revs when idle, no one can figure out the problem :(

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.
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Old 03-16-2012, 16:08   #6 (permalink)
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Re: High revs when idle, no one can figure out the problem :(

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.
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Old 03-17-2012, 06:43   #7 (permalink)
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Re: High revs when idle, no one can figure out the problem :(

Could also check wiring / harness / connector to TPS for water or dampness ingress.
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Old 03-17-2012, 06:48   #8 (permalink)
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Re: High revs when idle, no one can figure out the problem :(

Quick questions, my car runs on petrol, does it have an EGR / DPFE sensor ?
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Old 03-17-2012, 13:13   #9 (permalink)
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Re: High revs when idle, no one can figure out the problem :(

This might help you ,

DPFE Sensor and EGR Information - Focus Hacks
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Old 03-18-2012, 04:20   #10 (permalink)
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Re: High revs when idle, no one can figure out the problem :(

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.
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