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Old 03-27-2015, 01:34 PM   #1
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2013 Engine rev issue on interstate

I have a 2013 Focus Titanium automatic. About 37,000 miles and about 90% of these are all interstate driving with the cruise set at 55mph or 65mph (what ever the speed limit is). I am in no way a "car guy" other than "push the right peddle to go faster"

For at least the last 3 months (maybe longer) I have had an odd engine rev issue. If I go down a hill (not a big hill, but a hill) just as I get to the bottom the engine does a quick rev (at 55 the RPMs goes from about 2k to about 2.25k). Consistently. The same place on the same hills every day. Happens at 65 also, but most of that part of my daily drive doesn't have hills. I have reproduced the rev issue without the cruise control, so I don't think that is the issue.

I took the service manager from the Ford dealer I bought the car from on a road trip so he could see it happen. He agreed it was odd and he said there wasn't a gear shift, just an engine rev. The dealer said they called Ford and were told it wasn't a problem they (Ford) had heard of. The dealer is going to take my car for a couple of days to see if they can replicate the problem on the test equipment.

Does this sounds familiar to anyone? I am positive this can't be good for the engine to rev like this every (roughly) 5 minutes during my 40 minute one-way commute. And if the dealer comes back with a "we can't reproduce the problem even though we witnessed it)", I wouldn't know where to go next.

Thanks!
- brian



Last edited by BrianPez; 03-27-2015 at 01:35 PM. Reason: update title
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Old 03-27-2015, 01:48 PM   #2
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Moved to the MkIII section for more looks.

Sounds almost like it's starting a downshift, then changes it's mind as conditions change at the bottom of the hill. What's happening with the throttle in these situations? Is the hill steep enough for coasting at the same speed?
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Old 03-27-2015, 01:53 PM   #3
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And I forgot to say, the rev only happens for about a second. Long enough that I can hear it in the engine, but not long enough for me to be see it on the tach. I need to be looking at the tech before the rev occurs to see the RPM change.

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Originally Posted by sailor View Post
What's happening with the throttle in these situations? Is the hill steep enough for coasting at the same speed?
Not really sure what you are asking, but if it helps, the RPMs stay at a consitent 2K before the rev and after the rev. Only changes during the rev. Very rare that I don't drive with the cruise (who besides me actually drives the speed limit ), but I believe if I took it out of cruise and didn't touch the gas peddle the car would stay at 55. I can try that tonight.

It's weird to me because it doesn't seem like it needs to down shift to slow the car down and it happens before the next incline implying so it wouldn't need to downshift to add power for the incline.

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Old 03-27-2015, 02:03 PM   #4
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I was wondering about your throttle inputs when not on "cruise".

IIRC the car will downshift in cruise to try to maintain the set speed, something that wasn't common to earlier models. Remembering other threads questioning the engine "revving" when going down hills.

Your description sounded like a very particular situation, that's why I was taking a guess at a downshift that was cancelled as the hill flattened out & it was no longer needed.
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Old 03-31-2015, 06:39 AM   #5
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I spent all weekend trying to reproduce it without the cruise control without any luck. I didn't recall seeing it happen without cruise, but the gentleman from the dealership said he saw it occur on the drive along without the cruise one.

I also tried coasting on a couple of hills without cruise and without my foot on the throttle. In each case, the car slowed on the hill, which (to me) implies it isn't a "shift to slow down" type thing.

<shrug> I am out of ideas. The car is at the dealer for a few days for them to do testing, but I am not expecting much since Ford told the dealer they have no idea. I suspect I will get a "just live with it" answer and expect larger problems in the future.

And of course, this happens 1,000 miles after the 36,000 warranty....
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Old 03-31-2015, 08:38 AM   #6
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Our cars will use engine braking when in cruise to maintain the set speed. I forget what page of the owners manual it is on, but it explains it all in there.

Set your cruise at 55 mph, leave it on and accelerate to 75, let off the accelerator pedal and it will downshift to help reduce the speed back to 55. Pretty neat stuff :-)
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Old 03-31-2015, 08:58 AM   #7
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Quote:
Originally Posted by Scott D View Post
Our cars will use engine braking when in cruise to maintain the set speed.
If the Overdrive Cancel/Grade Assist button is pressed:
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Old 03-31-2015, 09:12 AM   #8
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Quote:
Originally Posted by Scott D View Post
Our cars will use engine braking when in cruise to maintain the set speed.
Huh, first i have heard of that. But the hills I am talking about are not nearly large enough to require it. If I drop the car out of cruise, it will slow down below the cruise setting, implying to me, that breaking isn't needed.

These are small hills. It only takes about 15 seconds to complete the downslope.

Last edited by BrianPez; 03-31-2015 at 09:14 AM. Reason: (added more info)
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Old 03-31-2015, 09:13 AM   #9
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Quote:
Originally Posted by wavsine View Post
If the Overdrive Cancel/Grade Assist button is pressed:
Your image says a light will be illuminated if grade assist is enabled. I don't have any lights illuminated.
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Old 03-31-2015, 12:20 PM   #10
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Quote:
Originally Posted by BrianPez View Post
I spent all weekend trying to reproduce it without the cruise control without any luck. I didn't recall seeing it happen without cruise, but the gentleman from the dealership said he saw it occur on the drive along without the cruise one.

I also tried coasting on a couple of hills without cruise and without my foot on the throttle. In each case, the car slowed on the hill, which (to me) implies it isn't a "shift to slow down" type thing.

<shrug> I am out of ideas. The car is at the dealer for a few days for them to do testing, but I am not expecting much since Ford told the dealer they have no idea. I suspect I will get a "just live with it" answer and expect larger problems in the future.

And of course, this happens 1,000 miles after the 36,000 warranty....
Hi BrianPez,

I can look into this further. Please send me a private message with your VIN, mileage, best daytime phone, full name, and dealer name/location. I'll check out some additional assistance.

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