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The limits of cruise control, interesting behavior

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Old May 19, 2014 | 03:24 PM
  #1  
Austinite's Avatar
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The limits of cruise control, interesting behavior

I have a 2013 Fit 5AT base. There's a steep uphill on my way home where the speed limit is 35. As an experiment, when nobody was behind or near me, I decided to see what my cruise control would do. I wanted to see if it would be as aggressive as I sometimes have to be with the throttle.

So, I got up to 40 mph at the bottom of the hill and set cruise. The angle of the hill almost immediately slowed the car down to 30mph, so 25% slower than the set speed. And rather than bring the throttle open enough and downshifting to maintain 40, it just held there at 30mph the entire way up the hill. It apparently is either willing to accept a 25% (or 10mph) lag or it isn't willing to open the throttle more than a certain amount. Or both. Thoughts?

Oh, and as a hint: there really *isn't* a gear that keeps the car going at 40 at this elevation grade. If I get on the gas and force a downshift, it will go 40, but then it wants to accelerate to 45. It won't stay down at 40 no matter how I lift up on the gas (we're talking about when i drive up without the cruise) unless I'm willing to let it sink to 35.
 
Old May 19, 2014 | 04:08 PM
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Can't speak for your hill. I live on cruise control. My 07 downshifts at a 2 mph drop. Never met a hill it wouldn't down shift on.
 
Old May 20, 2014 | 02:12 AM
  #3  
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There are hills in Texas?

I was surprised that the car would downshift when going down a steep hill in town. It kept itself from running away and felt like the brake was being used.
 

Last edited by BraytonAK; May 20, 2014 at 02:16 AM.
Old May 20, 2014 | 08:20 AM
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Lotsa hills in Texas. Drove from Phoenix to College Station, Texas, which is east of Austin. (Have family there) The terrain is varied. Going from West Texas to East Texas is like crossing an invisible line. You go from desert to green everywhere, really nice countryside. Austin is a nice town, has that Race Track of the Americas (I think it's called) where Formula One races. They even have Fits there.
 
Old May 30, 2014 | 03:17 PM
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Mine slows down quite a bit, and it will give it a good bit of gas. Though it cannot downshift since I have a 5mt.

My first car, a 99 Outback, had a super agressive cruise control though. If it didn't accelerate quickly enough, it would drop down one, even two gears and floor it! They actually had a programming glitch in a few of the 97‘s where, when going up a steep hill at ~75, the car would decelerate a bit and to try to get back up to speed would downshift into second!
 
Old May 30, 2014 | 05:03 PM
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[QUOTE=Austinite;1238498]I have a 2013 Fit 5AT base

set cruise. there really *isn't* a gear that keeps the car going at 40 at this elevation grade. If I get on the gas and force a downshift,

Guessing you have an automatic, as stick would require you to shift.
Mine hits a slight incline and down shifts, it will sometime down shift two gears so on big hill I usually turn of cc as it would waste gas.

I have noticed that it downshifts less if speed is at 60-65. just holds same gear and doesn't downshift unless it is slowing more that 10 mph.
 
Old May 31, 2014 | 12:33 AM
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Yeah, there is a pretty long and steep hill on my commute that runs @ ~50mph (speed limit) that does make me wish I either chose the Sport or waited for a MT to show up on the lot. The car just simply doesn't have a perfect gear for my run, and is constantly shifting on the way up. If I just let the gearbox do whatever it wants, I can never maintain anything resembling 50mph.




The only thing I've ever noticed from the cruise control is it won't set a speed under 25mph, and auto cancels somewhere below 25mph (~20mph, iirc).
 
Old Jun 3, 2014 | 12:35 PM
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[QUOTE=DaveFL;1240366][QUOTE=Austinite;1238498]I have a 2013 Fit 5AT base

DaveFL, I noticed in your post that you have a 2013 Base 5AT Fit which has cruise control?? Just curious. Mine is a 2009 Base 5AT. I regret not getting a Sport, simply because long trips are no fun because of leg fatigue holding the pedal for hours.

Is the CC on yours factory, or did you install an aftermarket unit? I really want to convert mine, but can't stand the cheesy stalk type that goes on the multifunction arm. Is it possible to upgrade to a Sport CC/wheel? Ideas?
 
Old Jun 3, 2014 | 11:08 PM
  #9  
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[QUOTE=gkitf16;1240923][QUOTE=DaveFL;1240366]
Originally Posted by Austinite
I have a 2013 Fit 5AT base

DaveFL, I noticed in your post that you have a 2013 Base 5AT Fit which has cruise control?? Just curious. Mine is a 2009 Base 5AT. I regret not getting a Sport, simply because long trips are no fun because of leg fatigue holding the pedal for hours.

Is the CC on yours factory, or did you install an aftermarket unit? I really want to convert mine, but can't stand the cheesy stalk type that goes on the multifunction arm. Is it possible to upgrade to a Sport CC/wheel? Ideas?
I did the spring modification to relieve the leg cramps, even tho I have cc, I did have to use more or different muscle to hold foot on pedal. On this forum you will find adding a spring from the top of the pedal to metal above will give the old feel pressure back to the foot that it didn't have.
Much cheaper than do add on cc.
 
Old Jun 4, 2014 | 09:09 AM
  #10  
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[QUOTE=DaveFL;1241008][QUOTE=gkitf16;1240923]
Originally Posted by DaveFL

I did the spring modification to relieve the leg cramps, even tho I have cc, I did have to use more or different muscle to hold foot on pedal. On this forum you will find adding a spring from the top of the pedal to metal above will give the old feel pressure back to the foot that it didn't have.
Much cheaper than do add on cc.
After I did the Polaski spring fix procedure, I forgot that I had cruise control.. I wish I had been able to find a Base model instead of the Sport at the time I bought mine..
 
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