Prius (2010-12) :: 2013 - Engine Hesitates At Highway Speeds?
Sep 3, 2013
I just got my new 2013 Persona Prius on Saturday. I haven't put too many miles on it (under 200) but I'm noticed that a feel a stuttering or hesitation when I reach highway speeds. Typically about 65 -70mph. I can't think of a better way to describe this but it feels like the when driving a manual transmission, when you need to shift to the high gear? That kind of stuttering feeling. I'm sure that it's not the same problem but it feels like that. Once I go faster, the feeling stops. Or slower. But going between 65 to 70, it's the same feeling.
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My 2008 Ford Focus SE hesitates at highway speeds, seems to decelerate and accelerate, sometimes more, sometime less and sometime not at all. dosn't seem to affect the acceleration.
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The temperature has dropped down into the 30s here and in my 2011 Gen 3 Prius, when I am driving at highway speeds (55mph-75mph), and go over any sort of light bump or rough road (gently rough, nothing significant just normal "imperfect" highway bumps), there is a rattling sound coming from the front of the dashboard where it meets the windshield that can only be described as the same sound that your hand makes when it's rubbing a balloon! Not your normal plastic random rattle, but like "rubbing a balloon with your hand quickly" sound.
I don't mind that other plastic random rattles from time to time (I am not OCD about the imperfections of how much plastic is in the car), but this is obnoxious and I feel like I'm literally driving a clown car. Is there some sort of lubricant or adhesive that is between where the dashboard and windshield meet that has possibly dried out, that the dealership could quickly fix or apply? I'll still under full warranty at 22k miles.
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What are the most and least optimal times to use cruise control at highway speeds?
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Eventually I was able to isolate it to somewhere under the rear deck. I removed the carpet, then plastic deck then even the spare, etc., Found it was actually coming from the sheet metal box that surrounds the connections coming from the car and relays to the hybrid battery box. Seems the metal edges of that small connections/relay enclosure were just touching the battery box metal enclosure just lightly enough to vibrate under certain conditions. But how to fix?
To make a long story short- I disconnected the 12v battery, removed the black exhaust duct over small metal cover, removed the battery cooling fan intake shroud, then two annoying orange lock rivets, then a few 10mm nuts and one 10mm bolt- and finally the metal connection/relay cover came off.
Once off- I used black electric tape to line every seam where that metal cover touched the battery box metal cover or car frame- I then lined the battery box metal cover the same way in the areas where the connection/relay cover mated on it. Reassembly was the reverse of disassembly. Upon ride to work this morning- vibration was 100% gone- fixed!
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I have just over 11K miles on my 2011 and now notice steering wheel vibration & slight shake at 70 mph. The passenger can also feel it.
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I have a 2010 F150 XLT crew cab, and I'm the second owner. Ever since I have owned the truck, it has had a pretty bad shake/vibration at highway speeds, that gets worse with higher speed. I have checked the alignment multiple times, rotated tires, had them re-balanced, and I still cannot figure out what is causing this. What else should I be checking?
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Took car in for normal service (69,000 miles) and had Tranny Fluid Service completed. When I took the car home I noticed some slight tranny slipping while accelerating up to highway speeds (so assuming 4th to 5th gear, maybe 5th to 6th). Took it back to the dealer and after a week it had a new transmission. Took it home and it slipped again, also only accelerating to highway speeds. Took it back and they told me they reset the computer that monitors my driving patterns. OK, not exactly sure what that means. So, now driving to work this morning it slipped (or maybe hesitated is a better word) again when accelerating from about 55 mph to 60 or so. Car has never had issues like this before, gas mileage is still in the 30 mpg range.
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