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Topic Review (Newest First)
10-25-2012 12:34 PM
dyn085 The drive-by-wire has been thought to be part of the problem. Someone mentioned months ago that it is a known problem on some Ford trucks and that the re-cal procedure was very simple and made throttle response much better. He said he was going to try it on the Focus and that was the last I heard of it-no confirmation as to whether it did or did not work

I agree with the tuning support, or lack thereof. What a load of crap. I personally feel that Ford has held back all of the aftermarket tuners in an effort to try and boost ST sales, but that is strictly my opinion.
10-25-2012 12:12 PM
suterp I did some searching and apparently the ecu update in tsb 12-5-5 is for build dates prior to march 2012. Mine was built in april.

I test drove 3 manual foci before I bought and they all seemed to have the slow throttle response. I'm starting to think it's just a case of the drive by wire being programmed for smoothness and fuel efficiency over performance which makes sense given 90% of the target market.

It sucks there is no tuning support to reflash the ECU. You would think with nearly a half million Foci being sold in the first half of '12 there would be enough demand for it.

Still plan to get the k&n drop in tho.
10-23-2012 05:31 PM
Han.MK3 Ask them for tsb 12-5-5 (I think it is) helps with throttle lag.

Sent from my PC36100 using FF Mobile
10-21-2012 03:42 PM
Originally Posted by suterp View Post
Dyn085, thanks for the tip, the K&N drop in sounds worth a try.
No problem, usually the best deal for it is on Amazon, upper $30's or low $40's
10-21-2012 03:21 PM
suterp Dyn085, thanks for the tip, the K&N drop in sounds worth a try.
10-21-2012 03:19 PM
Originally Posted by Villan515 View Post
Posted via FF Mobile sounds like u need an update done I had my updated by ford and it's alot better now stock I can get a 3 gear scratch
What do you mean an update? Do they come out with updates every once in a while or did you ask them to take care of a specific issue? Thought mine being brand new would have the latest updates?
10-21-2012 03:12 PM
Originally Posted by GN Prime View Post
with mine i can actually squeal tires if i'm going 5 mph then punch it:)
That would be great. When I punch mine, not much happens.
10-20-2012 11:40 PM
dyn085 I found that the easiest way to improve throttle response was to install a K&N drop-in filter. Any hesitation that I had immediately disappeared, and I had a couple of friends try it in their Foci when they had similar complaints. You won't have any hp increase, but the throttle becomes much more crisp.
10-20-2012 10:58 PM
Villan515 Posted via FF Mobile sounds like u need an update done I had my updated by ford and it's alot better now stock I can get a 3 gear scratch
10-20-2012 06:35 PM
GN Prime u have drive-by-wire i believe. my '11 is the same way:( i have a fswerks cai and stealth exhaust. both made a major improvement on acceleration. but the ecu has to be reconfigured to get past the throttle lag. with mine i can actually squeal tires if i'm going 5 mph then punch it:) i'm sure someone will chime in with more useful info!
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