Jump to content


Photo

Over Rev On Idle After Reconecting Batery


  • Please log in to reply
8 replies to this topic

#1 garry16lx

garry16lx

    Newbie

  • New Member
  • Pip
  • 6 posts
  • Name: garry
  • Ford Model: ford focus 1.6 lx
  • Year: 2002
  • Location: Hertfordshire

Posted 17 May 2012 - 03:58 PM

Hi, first post.

Well the questions in the title.

Bought my 1.6 LX a month ago and was all good. The engine bay was a rather dirty so I cleaned everything up, including disconnecting the battery terminals and cleaning those and re greasing.

Reconnected after about 15 mins and now when I switch engine on it idles around 1500-2000 rpm. I thought nothing of it so I went for a drive, and at every junction I come to a stop its still idled to high. But after about 5 seconds its settles back down to 850 rpm (or whatever its meant to be). In my opinion 5 seconds is too long.

Now then, when I was cleaning the engine bay I was moving a few pipes and cables out of their clips (the ones that run accross top of engine) to properly clean and using a bit of wd40 to polish them. (I may of on purposely accedently sprayed some on the air flow sensor, would that effect anything?). I may of dislodged the accelerator cable out of place.
Just need some advice on this to see if its a common problem n if its just coincedence that's its happened now but it has been since disconnecting battery. I've disconnected it since for about 2 hours to see if it will fix but it hasn't.

Sorry for the long post first post.

Hope someone can help.

Have something to contribute?

Sign in or register to start a topic...



Sign up to FOC Premium Membership To Remove These Ads

#2 garry16lx

garry16lx

    Newbie

  • New Member
  • Pip
  • 6 posts
  • Name: garry
  • Ford Model: ford focus 1.6 lx
  • Year: 2002
  • Location: Hertfordshire

Posted 17 May 2012 - 04:01 PM

Oh, and sometimes it won't even settle down to the proper rpm speed.
I know its common when engine is cold but I've been for hour long drives n does it every time I come to stop

#3 salsheikh

salsheikh

    Sal_Sheikh

  • True Ford Enthusiast
  • PipPipPipPipPip
  • 2,063 posts
  • Name: Sal
  • Ford Model: Focus 1.8 Turbo D
  • Year: 2008
  • Location: Warwickshire

Posted 17 May 2012 - 07:11 PM

Garry, you may need to get it scanned to see if it shows any fault codes. I would also recheck the engine bay to see if there are any loose wires. Like you said, the WD40 may have got into the airflow sensor and it may need cleaning with alcohol wipes or a cleaner of some sort.

#4 stef123

stef123

    Ford Enthusiast

  • Management
  • 5,866 posts
  • Name: Stefan
  • Ford Model: Mondeo ST TDCI
  • Year: 2006
  • Location: Scotland
Contributor

Posted 17 May 2012 - 07:54 PM

sounds like the ICV is sticking (idle control valve)

#5 garry16lx

garry16lx

    Newbie

  • New Member
  • Pip
  • 6 posts
  • Name: garry
  • Ford Model: ford focus 1.6 lx
  • Year: 2002
  • Location: Hertfordshire

Posted 17 May 2012 - 08:15 PM

i take it the ICV will be mounted somewhere around the throttle body. Ill give the Air flow sensor, IDV and the butterfly thingy in the thottle a good clean.
This must of been something ive done as the odds would be massive if something coincidently failed at the time i disconnected the battery.

#6 salsheikh

salsheikh

    Sal_Sheikh

  • True Ford Enthusiast
  • PipPipPipPipPip
  • 2,063 posts
  • Name: Sal
  • Ford Model: Focus 1.8 Turbo D
  • Year: 2008
  • Location: Warwickshire

Posted 17 May 2012 - 08:27 PM

sounds like the ICV is sticking (idle control valve)


good call Stef. if it is clogged then a good clean should sort it out.

#7 jeebowhite

jeebowhite

    Resident Loon

  • Super Mod
  • 21,138 posts
  • Name: James
  • Ford Model: Sea Grey Mondeo MKIV 1.8TDCi 140ps Zetec
  • Year: 2007
  • Location: Kent
Contributor

Posted 18 May 2012 - 01:43 PM

The fact that a rather dirty engine bay was washed out, would have flushed dust and dirt and other cack around the bay and likely would have got caught in the ICV as Stef suggested.

#8 garry16lx

garry16lx

    Newbie

  • New Member
  • Pip
  • 6 posts
  • Name: garry
  • Ford Model: ford focus 1.6 lx
  • Year: 2002
  • Location: Hertfordshire

Posted 23 May 2012 - 08:49 PM

right, ive had a little look and a play around with the few things, i havnt cleaned anything up yet but i will do that tomoz.
I noticed that when i disconnect the ICV electrical connector (while the engine was idleing high) the revs dropped back to the correct idle speed, and then when i reconnected it, there was only just a slight increase, but then if i revved it back up it will settle around 12/1300 RPM.
By disconnecting this plug, does this idicate that the ICV is faulty/clogged up??

Also, theres another electrical plug that goes into what looks like a sensor (with 2 torx screws mounting it the the throttle body) i take it thats the throttle speed sensor (correct me if im wrong) after disconnecting that nothing happens.

Before i spend anything on replacement parts i will clean things up first.

Does anyone agree that its the ICV thats the culprit?

#9 david295

david295

    Feet Under The Table

  • Budding Enthusiast
  • PipPipPipPip
  • 282 posts
  • Name: David
  • Ford Model: Fiesta
  • Year: 2011
  • Location: Cheshire

Posted 24 May 2012 - 07:05 AM

Am having the same problem, so am waiting to read replies.


Not what you're looking for?

Register now, we have a huge community of enthusiasts to answer any questions you might have



0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users