5 Minute throttle response/DCT solution? - Ford Focus Forum, Ford Focus ST Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum > Ford Focus Third Generation > MK3 Focus

MK3 Focus The place to chat about general questions, window tinting, exterior body, interior and lighting upgrades for the third generation 2012-Current Focus.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 08-02-2013, 02:20 PM   #1
dan50
Focus Addict
 
Join Date: Nov 2011
Fan#: 91789
Location: Too much info, IL
What I Drive: 2012 SEL White Platinum 5 Dr 302A

Posts: 1,166
Points 2,801, Level 32
Points: 2,801, Level: 32 Points: 2,801, Level: 32 Points: 2,801, Level: 32
Level Up 34% Completed
Level up: 34% Level up: 34% Level up: 34%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 11 dan50 Great Standing Member
Buy-Sell-Trade Rating: (0)
5 Minute throttle response/DCT solution?

In the 19,000 miles I've had my 2012 DCT-equipped Focus I've complained about lousy throttle response (bogging, surging,etc.) and DCT behavior (lunging at launch, mostly). I've stumbled upon a solution that eliminates 80% of my issues. Best of all, it only puts the car into the condition in which it was supposed to leave the factory and it's easy.

So those of you with these problems, try this. I'm curious if it will work for you:

1) Facing the car with the hood open, look on the right side and note the two intake tubes coming from the air filter compartment and going through the front bulkhead. (these tubes go through the bulkhead and attach to the intake horn located where cooler air is available for induction)

2) At the point where these two tubes meet the bulkhead, they are secured with a rubber strap that latches on the left side. Undo this latch.

3) You will see that the bottom of these 2 tubes are supported by a rubber base guiding them through the bulkhead. The top half of these tubes though merely butt up against the bulkhead.

4) The top of these 2 tubes are supposed to be sealed by the rubber strap. In my car, not only was there a 1/8 inch gap between the intake tube and the bulkhead, the rubber strap didn't fit securely enough to creat a seal.

5) Thinking this was not what Ford intended, I sealed the gap with a little duct tape and overlaid that with a layer or two of adhesive felt, then reinstalled the rubber strap.

6) To my surprise, my driveability issues largely went away. My car now behaves the way it should, with much better throttle response at launch and greatly diminished surging, bogging and lunging.

It doesn't make complete sense to me why this is so. However, as suction devices like an intake tube typically draw air first from the closest source and getting air from the intake horn is a bit "uphill" anyway, the car was probably ingesting a lot of warm, engine compartment air, particularly at a stop. When acceleration is asked for, it will suddenly start to ingest the much cooler air from the intake horn. If the PCM had adjusted the fuel mixture to suit the less-dense warm engine compartment air, a sudden introduction of colder air could make the engine run lean for a few seconds. What is a classic sign of a lean mixture? Surging.

So, this may be wishful thinking. However, it could explain why some cars are great and others aren't. It could also explain why some have improved throttle response by removing the intake box cover - while the intake air is hot at least its temperature doesn't suddenly change.

In any event, if you have these symptoms, undo the strap and take a look. If you have a gap or the strap doesn't seem to seal well try filling the gap with tape. Again, all you're doing is putting the car in the condition Ford intended. Apologies in advance if this is no help to others.



Last edited by dan50; 08-12-2013 at 08:40 AM.
dan50 is offline  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 08-02-2013, 02:23 PM   #2
TheNotoriousMAZ
Focus Enthusiast
 
TheNotoriousMAZ's Avatar
 
Join Date: Dec 2012
Fan#: 107418
Location: Brighton, MI
What I Drive: 2012 Sterling Gray Titanium

Posts: 113
FF Reputation: 1 TheNotoriousMAZ Good Standing Member
Buy-Sell-Trade Rating: (0)
Sounds like an interesting enough theory. Any pics you could provide of the process would be appreciated.
TheNotoriousMAZ is offline  
    Reply With Quote
Old 08-02-2013, 02:32 PM   #3
dan50
Focus Addict
 
Join Date: Nov 2011
Fan#: 91789
Location: Too much info, IL
What I Drive: 2012 SEL White Platinum 5 Dr 302A

Posts: 1,166
Points 2,801, Level 32
Points: 2,801, Level: 32 Points: 2,801, Level: 32 Points: 2,801, Level: 32
Level Up 34% Completed
Level up: 34% Level up: 34% Level up: 34%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 11 dan50 Great Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by TheNotoriousMAZ View Post
Sounds like an interesting enough theory. Any pics you could provide of the process would be appreciated.
No pics available (Luddite here), but it should be pretty obvious when you take a look.
dan50 is offline  
    Reply With Quote
Old 08-02-2013, 02:44 PM   #4
Matthew91188
Focus Enthusiast
 
Join Date: Jul 2013
Fan#: 116774
Location: Knoxville, TN
What I Drive: 2012 Oxford White FoFo SEL

Posts: 132
FF Reputation: 1 Matthew91188 Good Standing Member
Buy-Sell-Trade Rating: (1)
I did go look for what he was talking about, makes a little sense, I did see the gaps,don't have tape to mess with it right now but it's worth a shot.
Matthew91188 is offline  
    Reply With Quote
Old 08-02-2013, 03:15 PM   #5
bwh13
Focus Jr. Enthusiast
 
Join Date: Nov 2012
Fan#: 105709
Location: Phoenix, AZ
What I Drive: 2013 Silver Focuse SE

Posts: 39
FF Reputation: 2 bwh13 Good Standing Member
Buy-Sell-Trade Rating: (0)
I have noted a similar phenomena since the start of really hot weather here in Phoenix. During cool morning hours the car acts normally, but once the temp reaches about 100, I can notice a definite softening of the power from a start, with larger throttle opening needed to get the same acceleration as in the morning.

I really think the cars are more sensitive to the higher underhood temps and it shows up as poorer throttle response. I've noted temps as measured by the on-board temp gauge as high as 130F if the car is sitting in the sun, and it doesn't run as good as when it reads 85F.

I do have the Newmission mod on the airbox and a K & N drop in filter.

Last edited by bwh13; 08-03-2013 at 11:37 AM. Reason: info
bwh13 is offline  
    Reply With Quote
Old 08-02-2013, 09:04 PM   #6
peridigm
Focus Enthusiast
 
peridigm's Avatar
 
Join Date: Sep 2012
Fan#: 103341
Location: Rising Sun, MD
What I Drive: 12', Ti wrapped

Posts: 90
FF Reputation: 1 peridigm Good Standing Member
Buy-Sell-Trade Rating: (0)
I noticed similar symptoms after I installed my Steeda CAI. If I accelerate like a granny would it is sluggish and sounds like the car should downshift. This generally happens when I'm trying to keep the sound down when accelerating. If I drive it like a maniac it's fine.
peridigm is offline  
    Reply With Quote
Old 08-03-2013, 02:04 AM   #7
84Camaro_L69
Focus Enthusiast
 
Join Date: Nov 2012
Fan#: 105844
Location: Augusta, GA
What I Drive: 2012 Diamond Tri Coat White SEL HB

Posts: 125
FF Reputation: 1 84Camaro_L69 Good Standing Member
Buy-Sell-Trade Rating: (0)
I drive the car like I would my Camaro - FAST! - and it behaves a lot better when the revvs are up. My car is usually fine, but I'll look for it later.
__________________
Stock with factory Sony 10-speaker HD stereo and 4-wheel disc brakes.
84Camaro_L69 is offline  
    Reply With Quote
Old 08-03-2013, 02:54 AM   #8
Matthew91188
Focus Enthusiast
 
Join Date: Jul 2013
Fan#: 116774
Location: Knoxville, TN
What I Drive: 2012 Oxford White FoFo SEL

Posts: 132
FF Reputation: 1 Matthew91188 Good Standing Member
Buy-Sell-Trade Rating: (1)
As crazy as this seems I did it last night, and it seems to have a measurable improvement.
Matthew91188 is offline  
    Reply With Quote
Old 08-03-2013, 03:17 AM   #9
84Camaro_L69
Focus Enthusiast
 
Join Date: Nov 2012
Fan#: 105844
Location: Augusta, GA
What I Drive: 2012 Diamond Tri Coat White SEL HB

Posts: 125
FF Reputation: 1 84Camaro_L69 Good Standing Member
Buy-Sell-Trade Rating: (0)
If this works across the board then I hope Ford is monitoring this and comes out with a TSB.
__________________
Stock with factory Sony 10-speaker HD stereo and 4-wheel disc brakes.
84Camaro_L69 is offline  
    Reply With Quote
Old 08-03-2013, 10:18 AM   #10
CunFFS13
Focus Fanatic
 
CunFFS13's Avatar
 
Join Date: Aug 2013
Fan#: 117411
Location: Cancun, Mexico
What I Drive: 2013 Sterling Gray Ford Focus S MT

Posts: 2,446
Points 2,305, Level 29
Points: 2,305, Level: 29 Points: 2,305, Level: 29 Points: 2,305, Level: 29
Level Up 4% Completed
Level up: 4% Level up: 4% Level up: 4%
Forum Activity 35%
Activity: 35% Activity: 35% Activity: 35%
FF Reputation: 6 CunFFS13 Good Standing Member
Buy-Sell-Trade Rating: (0)
Does it apply for the 5 speed MT?
CunFFS13 is offline  
    Reply With Quote
Reply

Bookmarks & Social Networks

Tags
dct fix , powershift fix

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 05:07 PM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.