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05-07-2010, 07:24 PM
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#1 | ||
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yum
Join Date: Jan 2005
Posts: 1,417
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This probably applies to many cars but this is a problem I have with my LS Focus.
I've done 230,000kms in it and in the last 30,000kms or so its had a progressivly worsening idle when it would surge, then almost stall, then surge again, it got to the point where it would stall as you pushed the clutch in when coming to a stop. The cause of this is carbon build up from the EGR tube coming from the exhaust into the intake, immediately after the throttle body. There is a small gap between the throttle body and the butterfly that keeps the idle smooth, with this blocked, the ECU tries to compensate by opening the throttle body momentarily when it senses its about to stall. To fix this, take the airbox out by undoing the clamp, pulling off the silicone band at the front of the airbox (closest to the front of the engine bay), and undoing the rocker cover breather tube at the bottom of the airbox, then by pulling the box vertically. Unplug the throttle electricals by sliding the red tab towards the passenger side of the car and push it off with a small flat head screwdriver, then undo the 8mm bolts on the throttle body. Note that there is a bracket holding cables on the right 2 bolts. Be careful that no foreign objects fall into the intake When you have the throttle body off the car, clean the insides with carbie/throttle body cleaner and a toothbrush, really get in there. Replace all the parts and enjoy.
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2005 LS Focus LX
Nov05 | Manual | Black Sapphire 250,000kms. |
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05-07-2010, 08:45 PM
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#3 | ||
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Old enough to know better
Join Date: Apr 2005
Location: Melbourne
Posts: 2,311
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I tried to give you rep, but apparently I have to spread it around more!
Really useful post
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Manual 2003 Machine Silver 5 Door LR Focus Zetec. Mods: Ford Racing CNC'd cylinder head milled .040", 3 angle valve grind. Ford Racing Stage II camshafts. Ford Racing cam gears. Ford Racing long tube header. Random Technology hi flow cat. Herrod 2.25" stainless cat-back. Pipercross Viper intake. CFM 65mm throttle body. 2000 ported intake manifold. Herrod Custom SCT tune. Eibach suspension. Quaife ATB diff. Wilwood 13" brakes. Custom ST170 leather interior. www.cardomain.com/ride/2773918
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06-07-2010, 12:22 AM
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#4 | ||
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yum
Join Date: Jan 2005
Posts: 1,417
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Thanks guys, I haven't been on here much lately and wanted to keep the Focus love happening
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2005 LS Focus LX
Nov05 | Manual | Black Sapphire 250,000kms. |
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06-07-2010, 10:01 PM
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#5 | ||
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I wanna XR5
Join Date: Aug 2005
Location: South Oz
Posts: 749
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mmm wondered where you had got to?
I cleaned our TB the other day by doing it running using throttle body cleaner not having the starting problems! I do this to most of the commy doors I service as they suffer from carbon build up in the TB.
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Great Wall X240. Bouncing around the APY Lands Ex Ford owner and member of this great site for ages. South Australia, where the RIGHT hand lane is the NEW LEFT lane??????!!! %&#@* |
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06-07-2010, 10:23 PM
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#6 | ||
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You can call me Chris
Join Date: Sep 2009
Location: Sydney
Posts: 712
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How often do you think it should be done?
Thx for the advise!
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'06 LS Focus Hatch -2 1/4" Lukey Exhaust -RDA Slotted discs/Greenstuff pads -Rear Whiteline swaybay -Lenso 18's w/Kumho rubber -Tinted Windows |
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06-07-2010, 11:03 PM
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#7 | ||
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FF.Com.Au Hardcore
Join Date: Jan 2009
Location: Victoria
Posts: 877
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My throttle body after 50,000km (one on the right needless to say):
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06-07-2010, 11:11 PM
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#8 | ||
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You can call me Chris
Join Date: Sep 2009
Location: Sydney
Posts: 712
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well i do need to clean out my filter on the weekend - my car has just hit 52k, so can imagine how black mine is!
haha! Thanks for posting the pic!
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'06 LS Focus Hatch -2 1/4" Lukey Exhaust -RDA Slotted discs/Greenstuff pads -Rear Whiteline swaybay -Lenso 18's w/Kumho rubber -Tinted Windows |
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08-07-2010, 06:12 PM
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#9 | |||
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Hello Koni's!
Join Date: Jan 2005
Location: South Sydney
Posts: 762
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Quote:
Those bits are still available for you too if you want them, just PM me.
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2006 LX FOCUS SEDAN Titanium Grey, factory bodykit, slightly debadged
CSA Motorvatr 17's/Kumho KU31's, Eibach Prokit/Lovells rear springs, Koni Sports Kit Lower airbox removed, K&N Panel filter Momo gear knob + boot + pedals, Ghia boot garnish, Zetec Chrome interior door handles JVC KW-XR816 Headunit + more to come... |
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09-07-2010, 04:33 PM
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#10 | ||
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yum
Join Date: Jan 2005
Posts: 1,417
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I'd definitely do it at least every 120,000kms, 60,000km intervals much better.
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2005 LS Focus LX
Nov05 | Manual | Black Sapphire 250,000kms. |
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09-07-2010, 04:35 PM
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#11 | ||
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yum
Join Date: Jan 2005
Posts: 1,417
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I'm thinking of trimming down the other side of the butterfly screws so they are flush with the pivot. Anyone done this?
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2005 LS Focus LX
Nov05 | Manual | Black Sapphire 250,000kms. |
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11-07-2010, 08:32 PM
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#12 | ||
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You can call me Chris
Join Date: Sep 2009
Location: Sydney
Posts: 712
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went down to autobarn yeste, got some throttle body cleaner at the same time as getting the K&N recharge kit, and the throttle body was spotless - looked near new? Cleaned it anyway, but the filter was in definite need of a cleaning!!
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'06 LS Focus Hatch -2 1/4" Lukey Exhaust -RDA Slotted discs/Greenstuff pads -Rear Whiteline swaybay -Lenso 18's w/Kumho rubber -Tinted Windows |
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12-07-2010, 12:46 AM
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#13 | ||
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yum
Join Date: Jan 2005
Posts: 1,417
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Did you open the throttle or take the throttle body off and see the other side?
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2005 LS Focus LX
Nov05 | Manual | Black Sapphire 250,000kms. |
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12-07-2010, 07:07 AM
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#14 | ||
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You can call me Chris
Join Date: Sep 2009
Location: Sydney
Posts: 712
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ahh... so I need to take it off you say!!
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'06 LS Focus Hatch -2 1/4" Lukey Exhaust -RDA Slotted discs/Greenstuff pads -Rear Whiteline swaybay -Lenso 18's w/Kumho rubber -Tinted Windows |
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12-07-2011, 08:05 PM
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#15 | ||
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Mad Scientist!
Join Date: Jan 2005
Location: Newcastle
Posts: 2,818
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Question.
I've seen people do this while the engine is running. What is the best way? Take the throttle off or just spray around when engine idleing and let the engine burn through all the crap. I have new plugs to put in but just want suggestions. Its a 2002 LR focus. |
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12-07-2011, 09:50 PM
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#16 | ||
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FF.Com.Au Hardcore
Join Date: Jan 2009
Location: Victoria
Posts: 877
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You might as well take the whole thing off and do the job properly. For me, its always the back of the throttle plate and harder to reach places that get the carbon build up.
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12-07-2011, 11:50 PM
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#17 | ||
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FF.Com.Au Hardcore
Join Date: Apr 2011
Posts: 521
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Better yet get a brand called threebond engine conditioner. Spray it in and let it foam up, well just follow the instructions on the can, Repco sells it. We buy it by the box at work.
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Love Fords so much, I named my son Ford!!! |
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13-07-2011, 12:12 PM
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#18 | |||
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Regular Member
Join Date: Jun 2006
Location: Albury, NSW
Posts: 110
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Quote:
From what I used to read if you spray too much of it into your intake whilst the car is off you could get 'vapour lock' or something similar which is not good. Have done it previously on a running car with no issues. |
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Fixing a bad idle by cleaning the throttle body
Linear Mode
