Prius (Gen 3) Fuel :: Car Enters Into Stealth Mode On Highway Speed
Mar 1, 2013
I have only been driving my Prius for a month. I have been paying close attention the to the Car energy usage screen. I have been noticing the car (while on cruise control) entering into stealth mode (Engine seemingly off and power getting drawn from battery only w/ about 3/4 bar on EV) on the highway @ 60mph going down a slight decline. I have been trying to mimic this on my own w/o the cruise control, but no matter what I try (P+G and other techniques) I cannot get the same results.
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I'm a longtime Prius owner starting with a 2007. Currently have a 2010 model V (not the wagon, the trim level with ATP). The maximum stealth mode speed (i.e. ICE not turning over) is about 46MPH. The maximum stealth mode speed for my old 2007 was 42MPH.
I just bought a 2012 Prius c as my commuting car. What is the maximum stealth mode speed?
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Conditions often allow me to choose between moderate to high current draw in stealth mode, or a lightly loaded ICE (<1300 RPM). How much power do you find it's best to allow in stealth mode before you decide to give the throttle a slap and fire up the engine?
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My 2002 Prius A/C is acting strange. From what I understand, if you have Max A/C on it will keep the ICE running. Lately my car isn't doing that. Whenever I'm at traffic with the Max A/C on it will go into stealth mode then it will turn the engine on then back off again in a cycle.
Also whenever I hit the brakes or simply slowing down with the ac on the whole car will shake violently like theres a strong earthquake and its about to stall unless I shut the A/C off. This only occurs when the A/c is on btw.
Note :: I've had my ac charged so its not out of refrigerant. But I don't know what's causing it.
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I have a 2007 Prius with about 77,000 km on it. Lately I've noticed that the car would make an unusual noise sometimes when driving at around 50 - 60 km/hr in stealth mode, with slight accelerator pressure such that the energy monitor shows power flowing from the battery to the motor (ie - not gliding or regen braking).
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Just bought a 2010 Prius IV and loving the car.
Minor annoyance, but wondering why it's so difficult to get the car to enter or stay in EV mode.
When I'm able to get into EV mode, it often beeps that it's leaving EV mode due to excessive speed, but I'm often doing barely 10 mph when this happens. I was under the impression that I could do up to 25 mph. Yesterday, I was floating at 8 mph and it said that was excessive speed.
More often, though, I can't even get into EV mode. It says "EV mode currently unavailable" and why. Doesn't matter if I'm not moving or if I'm driving slowly.
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I have a Mazda 3 5-door and I believe it is a 2010 model year, with between 50k-70k miles. I've been, I believe, consistent with regular maintenance schedules, and this is the first issue I've had, and I've been having it for a bit of time now (a few weeks). I've tried various things to try and understand the issues that bring it up.
First, I don't remember if this started before or after, but my "Check Engine" light popped on. I brought it in to have the code read and it was the one for the gas cap not being on properly. The person reset the diagnostic code, tightened the cap, and I went on my way.
A few hours later it came back. Okay, but that's not the issue, and I mention it only because of the other things I've observed.
The real problem is, after I've been driving for "awhile" at highway speeds, and I add fuel, the car has a very difficult time starting. I have to really press the accelerator down to get it to start, and even then it can take a good 5 seconds of holding the key to "start".
Things I've noticed:- If I fill up at the start of a trip, so that the car hasn't been running long, I can fill up and the car starts immediately.- I thought it might be a problem with fuel spilling over into the overflow, so I've added less fuel (so I ended with the needle pointing between 3/4 and full) but it still had trouble starting- After I start it, it runs rough for a bit and I feel like I have to rev it to keep it from stalling, though I haven't left it to idle to see if it actually will stall.- After the difficult start, if I drive as little as down a city block, turn the car off, and back on, it has no trouble starting, nor does it stutter like it does when I fill it up.- If I take a long drive but don't add any fuel, it starts up right away.
I've always used 87 octane fuel, which seems to work fine, and I feel as though that's the recommended grade, isn't it? I also try to fill it up when the needle reads 1/4 of a tank or a bit more, but I do notice that, if I allow the pump to auto-shutoff the car will accept 9-10 gallons (and I thought it was a 10.5 gallon tank, which is less than 1/4 left... I'm not sure how bad that is...)
What it could possibly be? Or even additional tests I could try to narrow it down?
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I've been reading up on SHM. It sounds like I need to be able to see IGN to make the most of this technique. I have the Engine Link app (can't afford SCII) loaded with the Gen 2 presets that came with the app. I can't seem to find anything to indicate that I have an option for IGN for my display screen.
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How long could you stay in this mode at 65 mph on a flat highway?
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I am talking about the manually activated EV mode, not stealth mode that runs up to 46 MPH.
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What's top speed for EV mode? I was able to keep it in EV when driving through town, after a hill, and keep it around 41-42 for a little while before my speed dropped and I had to use a little more throttle.
I don't understand why you can't lock in EV and deplete more of your battery at times, such as a few miles before getting on the freeway. Seems a bit wasteful, since the highway portion would give you plenty of time to build up charge again.
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I have questions about ev mode for my Prius c. I just got the car in December and was using the ev mode frequently. It would work when I was going 25mph or lower as long as I wasn't rapidly accelerating or climbing a hill. Now it seems I barely get up to 10 mph before it clicks of saying "ev mode deactivated excessive speed". This happens when I break to come to a stop or when I slowly accelerate. I took it to where I bought it and the kid rudely told me to read my manual so I did and this isn't covered. I have lost 10 miles on my mpg and I have been doing the same commute since I got this car. Before I was getting 52.3 now I'm lucky if I get 40.
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I was under the impression that when you enable EV mode the car will stay in EV till around 40 mph or something close to it? I can't seem to go above 10 mph without getting a message stating "EV Mode disabled due to excessive speed"? Is this a glitch or can you really only go 10 mph? That seems pointless if that is the case.
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I've noticed the Prius V engine is running at very low RPM in ECO mode at steady speed of about 65km/h (40mph). Fuel consumption vary between about 4-5L/100km (58 - 47mpg) and RPM is showing about 1100+
I usually see RPM of about 1100 to 1400+ which is very good; so I'm not surprised this engine is very fuel efficient.
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My beloved Gen II, with 160,000 miles, this week started stalling (drive systems shutting down) when I press the accelerator to pass or to regain speed after slowing to enter an intersecting roadway. The dreaded red triangle and the check engine light come on. After pulling to the side of the road and fully shutting down, the system will restart, although the warning lights stay lit. (They both go out after a time.) Am out of town for a few weeks and hope to gain some insight that will allow me to wait until I can get the car back to a trusted service department. Suspect fuel filter, but replacement seems to require removal of gas tank.
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I've read several posts that suggest the EV mode is mostly useless. I disagree. I've noticed that it's useful in gaining speed faster without the ICE, when taking off from a stop. Especially if I'm in traffic and I don't want to annoy drivers behind me.
I've noticed that conditions have to be met in order to do this, such as engine warmed up etc. but I find it very useful, and I am seeing improved MPG when doing this. I've had my 2013 PRius v Two for almost a month now.
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My Prius v has 1300 miles. I didn't notice at first but now I notice a constant high frequency vibration in the car, especially at highway speeds. Took car to a tire shop and had tires dynamically balanced, same problem. I think it must be the toyo low profile tires or its in the drive train and just inherent to the hybrid system. Seems to be the same whether in eco mode or ev. Vibration is the same on smooth or rough roads. Dealer service manager says he is not aware of any problems. Suggests bring car in for a test drive and compare with another new one.
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I've been driving an 2007 Prius unitl last week, when I upgraded to an 2010 model. I'm very happy with it so far.
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Several time lately I've gotten in to go to work and the battery shows for half sometimes 3/4 of charge, but it will not go into EV mode. But I can be in town driving and it will go into EV mode with only 2 bars of charge. Whats up with that.
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Just curious, is the low speed electric acceleration in *hybrid mode* generally, seat of the pants, noticeably more robust than that of the 'regular', 3rd gen Prius? By low speed, I mean starting off from stop lights in normal driving.
Why do I ask? In 3rd gen Prius, electric acceleration lasts only a few seconds from a stop, maybe up to about 15 MPG roughly with light acceleration. With heavy throttle, gas engine comes on about right away.
How does the PiP behave under moderate acceleration from stop in hybrid mode? Could we say PiP accelerates on electric drive in HV about 6 MPH per second +/-x up to 25 MPH +/- x on level ground, etc....?
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So i was observing my battery charge indicator, it was 50% charged, and i was going 70 mph and begin to slow down to 20 mph to exit ramp, and at my best of my ability (dont have scan gauge to see if brakes are activating) I tried to use only brake regeneration (using < 1/4 way of the brake pedel) anyways when it was slowing down from 70 mph to 50 mph the battery didn't budge, but as soon as i when from 45 mph to 20 mph battery begin to charge and gained 2 battery bar, and its been consistent though out several tests i did. So my question is does the brake regeneration only works for speeds below 50 mph, and/or is the amount charged to a battery at 70 mph to 50 mph limited until speeds drops below 50 mph.
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