Prius (2010-12) :: Constant Loud Hum In Hot Temps
Jun 13, 2011
Fuel mileage dropped from 52 to 40 on several hot days and I heard a constant loud hum. In the shop tomorrow.
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Jun 13, 2011
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Prius (2010-12) :: MPG Drop With Colder Temps?
Was getting around 52.5 MPG in warmer weather, changed the tranny fluid and normally people report an increase in MPG. We're now getting around 50.5 MPG, so a 2 MPG loss. In addition, temps have gone from around mid-80s to mid-60s. Wondering if that would explain the MPG drop?
View 16 RepliesPrius (2010-12) Fuel :: Temps Went Down Right After Switched Wheels
Last week I switched my wheels and tires out from OEM 15 x 6 wheels with 195/55R15 Good Year Fuel Max tires to 16 x 7 Drag DR9 wheels (16.55 lbs.) with 205/50R16 Good Year Fuel Max tires. ( I wanted a different look) At first I didn't notice any change in mpg's, but that soon changed. The temps went down into the 20's for lows and 30's for highs. I went from 48 - 50 mpg to 41 -43 mpg in just a few days. I assumed that the drop was due to the cold weather. This morning I decided to check the tire pressure in the new tires. 32 psi all the way around. I asked the guys that installed the tires to fill them up to 44 front, 42 rear. I guess that never happened. Anyway, I looked on the sidewall of the tire to check max pressure and I was shocked (51 psi). I ran 44 front, 42 front on my old set, because that was what I was advised to do.
View 13 RepliesPrius (2010-12) Fuel :: Gas Mileage Went Way Down / AC On Nonstop With Higher Temps
I knew when I bought my car it wouldn't get optimum mpg as no car would with the many short trips I have to make every day but I have 5000 miles on it already and have averaged approx 46 with all the city and highway combined.
I took it into Toyota last week for the tire rotation and ever since it has been horrible. There were 120 miles on the tank and I refilled because I couldn't stand to see it staying around 39 on the computer. I have never seen that before. I checked the tired and they had brought them down to 32psi so I put then back to 40/38 and refilled.
Not noticing much of an improvement, sadly. Hovering at 40 mpg still. Weather has changed a lot. Temps much higher daily mid 80s to low 90s. This is my first summer with the car and yea the ac has been on nonstop with the higher temps.
Prius (2010-12) :: 2013 - Vent Blowing Cool Air At Higher Temps?
I purchased a brand new 2013 Prius 2 last October and I'm loving it so far.
However, I notice that even if it's slightly warm outside, and I have my cabin temp set at a higher temperature than outside, the vent blows cooler air.
For example, the other day it was 65F outside. Since it was warmer than usual, I turned down the cabin temperature to 65F as well. It was nice and cool, but a little TOO cold. So I turned it up to 70F. It was still blowing cold air. I had to turn it up to 72F before it was warm enough to feel comfortable.
Prius (2010-12) Fuel :: Grill Blocking In Mild Winter Temps
Typically here in the Phoenix area the coldest it gets in the morning is mid to upper 30s for about 2-3 weeks in dec/jan for the low and 50s for the high. Half of November, Jan, Feb & March temps are around 40s for the low & upper 50s-60s high
With these temps is it worth grill blocking?...and how much of a MPG gain would I get?
Prius (2010-12) :: Heater Blow The Constant Temperature Of Air
I have a 2013 Prius 4. I'm not sure if there is a problem or not but the heater just seems to blow the same temperature of air no matter how high I set the temperature. The air feels lukewarm. I was driving 60 miles yesterday with the temperature set at 76. I had on a long sleeve shirt and polar fleece jacket and it never got to where I was really warm. Outside temp was about 50.
View 10 RepliesPrius (2010-12) :: Constant Horn Honking When Low On Fuel
When I drove my 2012 Prius 3 today, the fuel indicator was flashing as I had about 20 miles until empty. I was on my way to get gas when suddenly, the horn was honking as if the alarm was going off. Nothing I did seemed to stop the horn, even clicking the unlock button on the key fob. Intermittently, the horn would stop, then start up again in a stuttering fashion, only to be followed by the incessant honking I mentioned earlier. I have a video of this but it must be too large to upload.
View 6 RepliesPrius (2010-12) Fuel :: Pulse And Glide At Constant Speed?
Two weeks ago we were driving across rolling hills in southern Ohio. I started to wonder, "What would be the perfect road for the Gen 3 Prius?" Is there a road shape that would allow the benefits of pulse and glide without the speeding up and slowing down?
Let's assume no net elevation change on an interstate highway and a driving speed of 60 or 65 mph. To stay in the most fuel efficient engine ranges for the ICE, we'd want down-hill stretches where the power demand shown on the hsi would be in the bottom 1/4 of the total Echo range, and up-hill stretches where we could stay in the top 1/4 of the hsi Echo range (just below Power).
Would the optimal ascent and descent angles be the same, or would the angle of decline be shallower that the assent angle? Would mileage (mpg) be better on this ideal up and down road than mileage on a flat road at constant speed?
Prius (2010-12) Fuel :: High Temps Dropping Fuel Economy?
While most of the emphasis I've seen on improving fuel economy seems to focus on warming the car up quickly in cool/cold weather, I seem to be experiencing significant mpg drops at the other end of the spectrum.
View 8 RepliesPrius (2010-12) Fuel :: Temps Have Been Dropping, MPG Dropping As Well
Grill blocked today for the first time and have a couple questions.
Temps have been dropping more these last 3-4 days and have noticed my MPG dropping as well so I thought I'd try grill blocking.
Tempts have been and will be high 30s-low 40s in the morning and upper 50s to mid 60s for the high.
At first I just wedged the pipe insulation and drove one trip. I didn't feel comfortable that it would hold for the long haul so I added zip ties.
I used two pieces of pipe insulation 1/2 inch copper / 3/8 inch iron. Up close it looks like 2/3 or 3/4 of the grill is covered.
My two questions:
For fWT, at what temperature should it not exceed?
At what outside temperature should I remove the pipe insulation? In the Phoenix area, temperatures rise in March and sometimes we will have a short period of warmer than normal temps in February. I just want to make sure I do not cause overheating.
Camry :: Loud Constant Thump Noise At Idle
2007 Camry LE 4cyl 125XXX miles ... The car sounds horrible at idle, but its not rough/shaky, just loud with a constant "thump, thump, thump" sound. It also whines with RPM increases, not just acceleration, but also while in park or neutral. Took it to Auto Zone and it tested with a bad voltage regulator in the alternator. In the process of calling around to different shops, they all seem puzzled that the alternator is bad, even though I replaced the battery 10 days ago and the battery light still flashes off/on while driving. So, before I go sinking a few hundred bucks into a new alternator, should I be looking at something else?
View 5 RepliesChevrolet - Tracker :: Loud And Constant Squeal When AC Turned On
2003 Chevy Tracker (same as Suzuki Gran Vitara) v6 2.5L
For about a year, it has had belt squeal on starting, which lasts about 5 minutes..it's louder when AC was on..would go away with higher RPMs. Once the car was warmed though, no squeal. Ac has been working very well and blowing cold whole time. Finally it around to replacing belt, which was a difficult.
Tightened with an idler pulley type system(not spring loaded). Started it up, squealed a little on start, but went away..turned on AC and the squeal is horribly loud now and constant..high rpms only make it louder. Noticed that clutch engages fine, but spins inconsistently..like we'll the belt is slipping. It spins slow, fast, slow..etc. I can't tighten anymore as the tightening bolt is at the end of the channel, don't want to strip it. Also noted that it is about a bolt head width more tight than its previous position.
Surely changing the belt wouldn't cause the clutch to bite it would it?
Other notes...drives great when ac is not on. This is an acc only belt..ac,idler,power steering. Also, during the repair, antifreeze got on the pulleys..I cleaned them all around with generous spray of brake cleaner..they look clean.
Prius (2010-12) :: Slight Hesitation At Slight Acceleration Or Constant Speed
I have a 2010 with about 166k miles. I am getting a slight hesitation at slight acceleration or constant speed. It does not matter if it's on highway or freeway speeds. Now I am not sure if this in junction with me changing the PCV valve, cleaning the EGR pipe, or cleaning the TB for carbon recently. It started happening a week after it though.
View 19 RepliesAccent RB (2012+) :: 2013 - Loud Snap / Constant Sound Of Wind Like A Fan On High
I was driving and heard a loud SNAP and now there is a constant sound of wind like a fan on high.
View 15 RepliesFord Ranger / B-Series :: 1990 XLT V6 - Loud Constant Whistle Sound On Driver Side
So I have a 1990 Ranger XLT 4x4, 2.9 v6. My issue is I am getting a loud constant whistle sound on the drivers side, just in front of the rear tire. It is not from the tire and it is a whistle not a whine. The truck is all stock nothing special. I do not have an exhaust anymore only a cat. Anyways the sound is constant an does not get louder or quieter while moving or in neutral it just stays the same. It just started in the last few days. Also the truck is a Manual.
View 3 RepliesPrius (2010-12) :: Loud AC Fan Noise
I have a 2013 Prius with 41K Miles. When I turn on the car I can hear the Air Conditioner Fan (my opinion) a bit louder than normal. I know it's the A/C Fan because when I turn off the A/C the sound goes away. It makes a weird Zoom sound, but louder than my previous cars and my wife's car.
View 9 RepliesPrius (2004-09) :: When Outside Temps Go Below 20 Car Won't Lock / Unlock
Second time I've had this problem this winter. 2007 Prius, about 65K miles. When the outside temps go below 20 or so the car locks seem to not want to work. For example this morning temp was about 19, smartkey unlocked the car ok-took a couple of button pushes but it worked. Car started fine. Drove to work and after shut down couldn't lock the car. Smartkey didn't work, pushing the door button didn't work. Lock switch inside the car works, so I locked the doors except driver's then used the manual key to lock the driver's door.
I've checked the battery using the internal maintenance screens, no load voltage about 12.3V, Load voltage 11.7Volts, Charging voltage 14.3 volts. I know I'm due for a 12V battery with it being 5 years old and such, and I'm pretty sure a good cold day will kill it dead. But, other than the battery...
Prius (2010-12) :: Loud Noise When The Engine First Started Up
Twice in the last month, my 2010 Prius has made this incredibly loud noise when the engine first started up. The noise continues for a minute or two, and then stops. The car then runs as normal. I brought the car to my dealer, who after a brief looking-over could find no reason for it. I shot a video of the car making the sound the 2nd time it happened and brought it to the dealership with me to play for the mechanic. No one who heard it there ever heard anything like it before.
It has been really cold here this winter, so "cold oil" was once thought, but was dismissed as unlikely. The car gets 0-20 oil.
Prius (2010-12) :: Long Single Loud Beep
unlike a lot of my fellow prii folks, i love the beeps. My favorite one is the confirmation of locking the doors by touch of handle and also unlocking by touch. Believe it or not i even like the backup beep which is kind of like a nice confirmation of "yo, dude! we are going backwards" but the most important one for me is the long single loud beep. happened the other day when i got out of my car to get a coke and the car emitted a continuous loud shrill beep as i started to walk away. I was still in drive.
View 3 RepliesPrius (2010-12) :: Loud Clunking Noise From Engine
We're having problem with our Prius where car suddenly started to make weird clunking noise from the engine (28k miles, 2011 Prius). Car sounds unsafe to drive around, so I left it parked in the drive way. I did check engine oil level and it was at F level.
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