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Old 10-20-2012, 05:24 PM   #1
suterp
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Throttle response

I bought a '13 Focus SE 5 speed a couple of weeks ago. Really enjoying the handling, the awesome manual transmission, and the smooth revving engine, but I've noticed the throttle response is pretty poor. I have an '08 scion xD with only 128hp that feels a lot quicker off the line due to the throttle response and possibly the gearing, not sure. The Focus pulls harder once you get going and feels decently strong in 2nd-5th gear but weak in 1st gear. Has anyone else noticed this? What it my best bet for improving throttle response? Intake or exhaust or wait for an ECU remap?


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Old 10-20-2012, 06:35 PM   #2
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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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Old 10-20-2012, 10:58 PM   #3
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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
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Old 10-20-2012, 11:40 PM   #4
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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.
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Old 10-21-2012, 03:12 PM   #5
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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.
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Old 10-21-2012, 03:19 PM   #6
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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?
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Old 10-21-2012, 03:21 PM   #7
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Dyn085, thanks for the tip, the K&N drop in sounds worth a try.
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Old 10-21-2012, 03:42 PM   #8
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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
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Old 10-23-2012, 05:31 PM   #9
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Ask them for tsb 12-5-5 (I think it is) helps with throttle lag.


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Old 10-25-2012, 12:12 PM   #10
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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.
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