Prius (2004-09) :: Front End Drag - Reduced Acceleration And Glide
Mar 11, 2016
I've had an issue with my 08' for a few weeks after returning from a 1 week vacation with the car sitting on the street in NYC. The symptoms are a noise associated with poor performance of the vehicle. It accelerates slower and requires more RPM. When you take your foot off the accelerator it feels as though there is a brake on or some additional drag somewhere in the front end. It's really evident that it doesn't actually glide, but it decelerates rapidly.
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I have an '02 with 49,000 original miles. No problems until recently.... warning lights appeared --PS , exclamation and check engine light came on, had reduced acceleration capacity, so I pulled over, shut it off and restarted. Lights still on but continued to drive just fine. After about an hour of driving 2 lane highway, made a "rest" stop, turned off then turned on and NO warning lights!
Next time I went to drive the car several days later, lights were on again, did not go away after 20 min. of in-town driving. The only thing I can think of is that I left a dome light on for several hours, a week ago, before the warning lights incident. Maybe depleted the battery, but the car started just fine right after, so I didn't think there was any problem. Until the warning lights appeared recently.
Could the two be related? What does this tell me? Is my battery a culprit? Can it be re-charged if it is low? I live in a rural area where there are no Prius mechanics... would be nice if I could deal with this myself. Not sure if it has the original batteries.
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I have a 2005 F150 4x4, with just over 75K, and I have owned it from new. I am having left front brake issues. The left front brake seems to drag, but of course does not do it consistentally or after a given type of braking event. It just does it very randomly. I originally replaced the caplier pins thinking one may have been hanging up. It seemed to fix the issue for a couple months then it happened again. So doing more inquiry it seems some have had issues with the front rubber lines.
I just had both front lines replaced with OEM Ford parts and the system flushed out at a dealer. The brakes again seemed to work fine driving home from the dealer anto work today. Then on the way home it did it again, started dragging. The truck starts to feel sluggish while accelerating and slows very quickly just lifting off the gas. then when you get out you feel the wheel and it is very HOT and you can hear a heat popping sound. (First time it happened it was smoking it got so hot.) Right side seemsfine.
Since it does it so randomly I am at a loss. I can not just drop it off at the dealer and say drive it until it. I am considering having the caliper replaced, which I really considered when it was at the dealer for the hoses since I had the IWE's done at the same time, so they were off.
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Had a lift done (Rough Country, after reading through these forums) on my 04 F150 Newer Body Style 4x4. Now, sometimes the pedal gets harder to push on until it won't go down at all and the brakes (only the front) start dragging. It goes away after awhile (my rotors are shot and I'm going to have to replace them after I figure out what is going on) but always comes back. The brake lines have been bled and I'm having a shop bleed them again tomorrow (that's what they said the issue was) just in case.
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She was driving and she turned onto another road this morning and the Prius started making a popping noise which lasted about 30 seconds. She normally averages about 42/43 mpg but it is down to 37 mpg. She said she has noticed since yesterday the Prius did not drive the same (I am assuming she means the power). The Prius is a 2006 with about 105,000 miles on it. Nothing has ever been done to it since we purchased it new in 2006 except oil and tires.
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I have great success doing pulse and glide in city. I once drove 32 miles non highway at 90mpg in a single trip using this technique. But it seem that it is impossible to do so on the highway, speed goes down too fast during glide. I found that too many pulses on highway actually decrease mpg. How to greatly improve mpg in highway driving?
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My headlights on my 2006 are hazy and yellow and the light output is reduced. I tried some plastic headlight cleaner stuff but it was clear for like a month, and now it looks even worse than before.
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I bought a used 2008 Sonata GLS with 65K miles 2 years ago. It's been a great car so far. For the first 25K miles that I drove it, it had good pickup and got ~30 MPG for my highway driving. In the last ~5K miles, the fuel mileage has dropped to 25MPG highway and it has some hesitation when accelerating, especially on lower RPM's. I changed the spark plugs with NGK Iridium, but it is still having the issue. What to check?
Some possibilities: ignition coils, sensors, timing belt, etc?
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While pulse and glide, is it better in Eco mode or normal mode with Prius c?
Eco mode will take more time to pulse, it may lower mpg?
Nexus 7 ?
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Brand new 2015 Pruis two.... Still on 1st tank of gas. Can't get it to glide for more than a second or two generally. I'm experienced at the technique from owning a 2006. Could regularly get 50-60 mpg in that car. New 2015 won't let me glide. Today I had a minor breakthrough when it let me glide for 9 whole seconds! Mostly it bounces me between "charging" and "EV" without giving me a true glide. 1st tank is set to deliver a lackluster 39mpg.
I'm not too worried about that yet because I've spend some time sitting the car (with air) learning all the controls that have changed since 2006. Couple of things I'll try next: I have not driven too much in ECO mode yet... mostly just regular mode. Normal commute 24mi round trip mostly highway. I'll check the tires next trip and the parking brake when I run an errand in a minute. Also whether maybe there was a current software upgrade that's suppressing this?
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As I understand it pulse and glide should work at pretty much any speed. I'm trying to adopt pulse and glide but I drive on mostly 55 MPH hilly roads. If I'm in HV mode and have some EV range I find I can only get ICE shutoff below 42+/- MPH. However if I switch to EV mode as I back off the pedal the ICE will shut down at speeds up to 62+/-MPH. Switching from EV to HV while gliding at speeds above 43 MPH causes the ICE to resume turning. So I've tried accelerating to my desired pulse speed in HV coordinating releasing the pedal with selecting EV mode to begin the glide then beginning the next pulse by simultaneously pressing the pedal and mode button. Alternatively I can stay in EV mode for the glide then floor the pedal to restart ICE but that risks getting an undesired higher less efficient ICE power level and doesn't allow lower power pulses to allow glides to begin on downgrades.
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My front disc brakes are creating a small amount of drag on the rotor. With the car jacked up and wheel off I am able to easily turn the rotor by hand, but there is a small amount of drag. I haven't had any problems with my brakes, they have never frozen or overheated, etc. I put new brake pads and rotors on the front about 6 months ago only because it was time for replacement. The question is: how much disc brake drag is acceptable? Looking around on the internet for answers there doesn't seem to be a consensus: some people say absolutely no brake drag, some say that a small amount is normal. What do you think?
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This is my sway bar and drag link look like with the wheel turned all the way to the right. When I took these pictures, I had put the right tire on the curb too see what it was going too look like. However. Even with all wheels on level ground. It still is running very close. When the steering is straight, I have maybe 1" to 1.5" clearance between the 2. My truck does have a readylift 2.5" level kit on it. Running like this stock or leveled? Should I look around for longer sway bar links?
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I am a new 2010 prius owner and I am very interested in obtaining the max MPG in my new car I have read and seen video with regard to the pulse and glide method. My question is
1. can you shift into neutral on the glide
2. can this do any harm to the car.
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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?
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Correct me if I'm wrong - Pulse & Glide is not really possible at speeds higher than, say 120-130km/h (74-80mph). I have noticed on my last trip that if you want to keep 130km/h average and you pulse up to 140km/h and glide down to 120km/h, when "gliding" the engine never shuts down, and the glide period is very short.
When pulsing back to 140km/h it takes a "long" time and the instant fuel consumption is "high" (e.g. 6-7L/100km) while when "gliding" you are actually at 2-3L/100km, which means on average you are at about 5L/100km, which is what I would get in any case if keeping speed constant with the CC at 130km/h.
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I own a Prius C 2013. I read about Pulse and Glide, and I also watched youtube about it. I somehow have never seen a situation where there is no arrow in the Energy Monitor. The best I have ever seen is arrow coming out of the battery only which is EV mode. Some people say 35-45 is the best speed for P&G, but I never see "no arrow". What speed makes the car run without arrow?
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On a recent 3k plus trip where I pulsed and glided a ton, when the PIP was in HV mode but gliding in the sweet spot where I had thought the engine would stop turning, no matter how I tweaked the glide, the ICE always turned at a minimum of 998 RPM per my torque app. The display was always showing 999 mpg in that situation so I assume it wasn't using fuel but just rotating freely. Is that the default behavior for HV mode? I,e, always rotating at 998 minimum rpm perhaps so it can kick in quickly if need be without vibration?? If so, the 10k oil change interval seems dicey as the engine is technically turning all the time when in HV mode. I was planning to change at 5k anyway.
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My 2008 ford f250 SD Powerstroke has a bad front passenger side brake rub/ dragging after offroading before off roading just rubbed a little now it drags a lot. what do i need to fix.
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I'm talking basically about the equivalent of your standard pulse and glide in the regular Prius. But the PiP would allow you to do it up to 62 mph. However, you would manually have to toggle the HV/EV button to do it. It would be tiresome.
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08' 4x4. I changed the front brake hoses because the truck felt like it was dragging a bit, when i would hit the gas from a stop, that seemed to work, I also changed the front rotors because when braking I was getting a pulsing feeling in the brake pedal. that fixed that.
Now I feel like there is still a bit of a slight drag when I'm at a stop and let off the brake. when im on level ground the truck creeps forward from a stop when letting off the brake, on the slightest incline the truck wont go forward at all.
Do the truck want to move forward on a tiny incline or no?
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