Prius (2004-09) :: Engine Turning On At Low Speed / Acceleration
Aug 31, 2012
I have noticed that recently my engine seems to be coming on when I accelerate from a stand still even with very slow acceleration.
For example today: battery over 50%, foot off break and onto gas very gentally, 0 to 10 in about 4 seconds at about 8 mph I feel the engine kick in.
Over the last few days it has seemed like the engine has been running a lot in town or when moving slowly in heavy traffic.
If I press the ev button I can accelerate quiete aggressively before the engine will start.
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Lost all acceleration yesterday while driving at highway speed. Tire pressure light came on also large warning sigh and check engine . Had been stuck in bumper to bumper traffic before this with AC on.Gas pedal to the floor but no acceleration. I pulled over and shut off car. When I tried to restart the lights mentioned above went out Except the check engine, NOW all the brake warning lights are on in a yellow color including the emergency brake.Brakes do stop the car (had to push it onto the tow truck) Car comes on but does not display the READY sign.
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I understand the engine turns on and off frequently (coming to a stop it turns off, then when going it turns on). I have noticed that sometimes when at the stop it will turn off, then immediately back on, and off again, even with my foot on the break.
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Motor started to misfire while out on grocery run. scanner said mifire on #1 so I bought a coil and plug. car ran well for a day then same thing on # 2.. repeat.. then # 3 repeat so did #4.
Now it did it again on #3. I switched the coil #2 and #3 to see if scanner would show if it followed the new #3 coil but so far no code. The misfire is on light acceleration, push down hard and it does not miss. Today I will try some fuel injector cleaner.. Is this the trail I should be following ?
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I have a 2007 Prius with 136,500 miles on it. Love this car. Getting 53.3mpg currently. A while ago I started noticing a strange sound coming from the passenger side of the car where the engine is. Recently the sound has become more pronounced and it has me stumped. The noise occurs upon acceleration, but not all of the time. If the battery is at 2 purple bars and I accelerate, the noise is very noticeable. But once I get to cruise speed it goes away. Again, this is sometimes and not all the time. Hopefully it's nothing, but I figured I would post this incase something is on the verge of failing so I may catch it in time.
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My 2004 Volvo S60 has 99,000 miles on it. Just today it started making a quiet noise like an electric golf cart when I accelerate. Also just today it developed a quiet grinding noise when I turn the wheels (but only if the car is moving). I just had a clutch replaced by on the a/c compressor and I have my car serviced according to schedule. What the problem(s) could be?
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Some days ago while I was driving, the check engine, red triangle and vsc lights came on and immediately my car slowed down. It would take longer to accelerate and every once in a while upon getting to a stop sign, it would take long to get to 5 from 0. could this be my hybrid battery going out? My regular scanner can't pull up any codes on a prius.
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i have been hearing a rattling noise coming from the engine under acceleration only. It isn't a super consistent rattle, seems to only happen when accelerating from lower speeds. And sometimes you don't hear and other times you do. It's not a bad rattle or knock it's more of a ticking/light rattling sound that is definitely abnormal.
I know my brake accumulator is barking at me and the 3 way coolant valve is going bad as sometimes I get a constant pumping sound. I don't think these have anything to do with it but thought I'd mention it.
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I need to diagnose an issue I've had with my 2007 Prius with 79,000 miles on it. Several months ago I noticed a distinctive whining/humming noise coming somewhere from the engine compartment of the car while driving. The noise may be present at lower speeds, but the volume of the noise appears to increase proportionately with my acceleration and as such is most noticeable at highway speeds of 50 - 70 miles per hour. As I accelerate faster, the noise level seems to increase. If I take my foot off the gas and coast, decreasing speed, the whining noise gets lower in volume. I believe I first noticed this noise about 6 months ago, but wasn't more proactive about it like I normally would be because at first the noise didn't seem overly loud and my extended warranty unfortunately was up once I hit 77,000 miles. Now 6 months after I first noticed the noise, I believe it's definitely louder than it was when I first heard it, so much so that I can pick it out over the radio being on at a decent volume.
After checking some forums I thought the culprit might be a wheel bearing. I took it into a local Midas shop at they informed me that my passenger-side front wheel bearing was actually breaking apart in pieces. Obviously I had that wheel bearing replaced but I was also hoping this was the source of the whining noise. Unfortunately that wasn't the case as driving it home the noise was still present. They also said the tires were not balanced properly (from my Toyota Dealership no less when I had them install new tires) so I had the tires rebalanced as well. They did take the car for a test drive but probably stop looking for issues with the car as soon as they saw the wheel bearing in that condition. Also that shop does not specialize in Prius' or hybrids so they might not be able to notice the noise that shouldn't be there like I can.
Other than wheel bearings, where this noise could be coming from. Some posts on here possibly pointed to the ICE water pump or transaxle fluid (which as far as I know has never been replaced since I bought the car new).
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I have a shudder that happens when turning right at a grade of about 10% while accelerating, and only on that condition. While making a routine drive somewhere, there's a turn with that one condition. Every time it shudders. It doesn't bother me because it happens so rarely...
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I found recently that my 04' Prius' engine easily goes higher rev than before (based on engine sound pitch). It happens mainly when cold start, go up hill. After warmed up and on flat road, it goes back to normal. Overall, still in great condition at 211K. MPG stays at 46 on meter when temp is around 45F with 50% highway drive at 100 miles/day. I suspect the serpentine belt slippery or something. What do you think? I think the belt is original. I bought it used at 104K.
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I have a 2007 Toyota Prius. When I press the brake pedal and press the start button the engine does not start or the wheels are not powered by the battery. It gives me the following errors:
The indicator in the Start button lights in Amber Color.
0 kmph mark is not activated in the dash board pannel.
When I shift the gears it only shifts to neutral ("N") gear.
I cant move the car forward or backward. An error message is displayed in the MFD in Japanese language. It is in Japanese and I cant read the error message.
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I took my car to the car wash and they seemed to take longer to vacuum/wash it and while driving it away, I noticed something was off. It seems like the engine is louder than normal. Before when starting the car, it would take 30 seconds to a minute before the battery/engine would come on. Then while accelerating to about 25-35 mph, then the engine would come into gear. When going on the freeway, if accelerating at a quick speed it would sound really loud. Now, it seems like instead of silent, quiet, a little louder, louder and loudest - it's moved to the next level. When starting the car, the engine starts right away and when driving away (at less than 25 mph), the engine sound like I am on the freeway and when I'm on the freeway it sound like I'm trying to gun the engine. I don't know what it could be.
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I know from what I've read that this tsb should have been addressed on my vehical (04 V8 early vin). The car has had two previous owners and the 2nd purchased as vw certified. I bought the Treg when it had been certified again 18 months later, so why does this "binding" due to the stepper motor software still exist after all tsb's have been performed
Its happened twice in three weeks now........when you shut down and start again everything is ok.
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I picked up a 2004 F150 a few weeks ago. It has the limited slip 3.73 rear end. During acceleration on turning, I'm feeling quite a bit of chatter out of the rear end. I've read the TSB on it, and I'm wondering how much it'll cost to get the clutchpacks replaced in the rear differential.
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My 2008 Prius with 105k miles recently started having a strange clunking noise when turning at low speed. Dealership diagnosed it as the steering shaft and yoke to replace.
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Is there any way I can raise or lower the temperature without turning on the fan speed? For example if I want to raise the temperature from 68 to 72, I literally have to hit the "Lo" speed and then raise the temp.
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Recently, my 2003 manual honda civic accelerates very slowly, even the engine speed goes up to 4000 rpm. Usually it takes up to 1 minute to reach 60mph on high way. Is the clutch getting bad?
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Ever since I had my Prius in the dealership for the most recent brake recall I noticed a noise (which is hard to describe, something like a muffled clicking) when turning and braking at low speed. If I let my foot off the brake the noise seems to go away. This seems to be happening on both left and right turns.
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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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I recently bought an'08 Base model. It is making a creaking noise in the front end on the left side either behind the wheel or under the motor. It only does it when taking off from a stop and/or turning mainly to the right during slow speed, seems to be when the body weight is shifting. To me it sounds as though something needs greased or maybe a strut.
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