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Old 6th Aug 2009, 15:26   #1
Big Chris
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Question Ford Focus 'ghost' revving...

I drive a '99 Focus 1.8 Zetec.

Having just started the car and lets say am reversing out of a space or moving in slow traffic, the revs stay at a more or less constant 2000rpm even when I'm on the brake, and sometimes in neutral too. Once the engine has been on for a minute or two, this stops and the engine behaves normally again.

Is this to be expected?

Something...
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Old 6th Aug 2009, 15:27   #2
jamoor
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Sounds normal to me, I think it may be a warmup cycle?
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Old 6th Aug 2009, 15:28   #3
Andr3w
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The engine is cold so it will rev more to warm itself up. Once the engine is warmed up it will idle at much less.

Although 2000 does seem a little high.

edit: Do you mean it will stay at 2000 even when you apply the *go faster* pedal?

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Old 6th Aug 2009, 15:28   #4
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its normal

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Old 6th Aug 2009, 15:31   #5
Conscript
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It's normal to rev higher when cold to warm the engine, but 2000RPM does sound a little high, especially as the weather at the moment is pretty warm as it is. I think mine revs to about 1500RPM when idling from cold.

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Old 6th Aug 2009, 15:38   #6
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It's up at around 2000rmp, sometimes slightly lower at say 1800rpm.

Once I hit the juice pedal it goes up as normal.

Makes sense that it would do it when cold though, cheers guys

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Old 6th Aug 2009, 15:46   #7
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Yeah mine does this in a morning sometimes. Its normal.

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Old 6th Aug 2009, 15:51   #8
CaptainFail!
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My Focus does this too, especially when the air con is on when the engine is cold, I also tend to find it revs up when the clutch in down when sitting at lights etc
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Old 6th Aug 2009, 15:57   #9
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Quote:
Originally Posted by CaptainFail! View Post
I also tend to find it revs up when the clutch in down when sitting at lights etc
Yeah this happens to mine too, you get some funny looks when sitting at a red light behind a load of people revving your engine!

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Old 6th Aug 2009, 16:34   #10
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I had exactly the same car until recently and mine did that too.
Mine only did it when the clutch was down, so you could be going along on tick over at 1,000 rpm or so and as soon as the clutch pedal went down the revs went up to around 2,000.

As others have said it's just because the engine is cold, but mine certainly seemed more noticeable than other cars I've driven.

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Old 6th Aug 2009, 16:34   #11
wesley
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my 2002 focus does exactly the same but rev at 1400rpm ish first thing in the morning, after few mins later, it goes back to 800rpm ish

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Old 6th Aug 2009, 16:37   #12
Conscript
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Ive never had the clutch pedal down thing with mine. Clutch down, or clutch up in neutral, it idles at 750RPM at operating temperature as far as I know...

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Old 6th Aug 2009, 16:49   #13
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A bit higher when cold sounds normal, 2000rpm doesnt sound at all normal to me
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Old 6th Aug 2009, 16:57   #14
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If it's going up to 2000rpm its not normal its atleast twice what it should be. Most cars should idle at around 1200rpm when cold and then 900 and below when warm.

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Old 6th Aug 2009, 17:03   #15
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check your throttle linkage , maybe it's just sticking. If you rev it, does it then drop back down below?

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Old 6th Aug 2009, 17:31   #16
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Defo too high, my St170 sat max 1200 cold, you could adjust the linkage easy but reving too high would mean a tight cable which can only happen if it's adjusted and would sit high all the time. Maybe the Maf/idle control valve is faulty/needs cleaning.
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Old 6th Aug 2009, 17:38   #17
Ev0
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check the throttle cable, make sure it's moving freely and not frayed at all. Sometimes this can cause them to stick a bit.

Otherwise yeah it's probably just the car compensating for the cold start, but agree it does seem a little high.
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Old 6th Aug 2009, 19:06   #18
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I'll double check the revs over the next day or two, it's certainly not far shy of 2000rpm when it happens.

As for the throttle cable, I'm not very well versed under the bonnet of a car (really should learn) but I've got some mates who like to get their hands dirty so I'll get them involved.

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Old 6th Aug 2009, 20:04   #19
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Sounds like a sticky idle control valve.
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Old 6th Aug 2009, 20:20   #20
osc89er
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The 1.8 Mondeo from that era would rev at approx 1000rpm when cold. I say the Focus is broken. The Idle Control Valve is a likely candidate.

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Old 6th Aug 2009, 20:32   #21
ardy89
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Can anyone comment on whether changing/cleaning the idle control valve is a fairly simple job and also where it is located in the engine bay of a 1.8 focus?

Thanks
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Old 7th Aug 2009, 07:23   #22
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Quote:
Originally Posted by ardy89 View Post
Can anyone comment on whether changing/cleaning the idle control valve is a fairly simple job and also where it is located in the engine bay of a 1.8 focus?
Just what I was thinking.

I checked the revs again this morning, seems that it stays bang on 1750rpm (2000rpm was perhaps a tad overestimated) for a minute or so, then idles at 750rpm when the engine has warmed a bit.

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Old 7th Aug 2009, 07:51   #23
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Quote:
Originally Posted by Conscript View Post
It's normal to rev higher when cold to warm the engine, but 2000RPM does sound a little high, especially as the weather at the moment is pretty warm as it is. I think mine revs to about 1500RPM when idling from cold.
gf's fiesta seems to have a cold idle of about 1500-1600 rpm
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