Prius (Gen 2) :: Downshifting Or Slowing Down On Small Hills - Bucking Or Jerking When Accelerate
Jun 18, 2014
I have owned a 2007 2nd Gen Prius for about a month in a half. I love my Prius although I purchased it with high miles (just under 200K) I felt a little adventurous and took it on a rather lengthy trip from Ohio to Nebraska and then to South Dakota and back home) a few weeks ago and I've noticed a few things since.
Before this trip I could let my car coast down slight grades or hills with no issue. The car just coasted like normal which save gas of course. Well now on slight hills it feels as if the car is down shifting. It actually slows itself down slightly. On steeper grades it will still coast but up until a few weeks ago I could literally coast on a slight grade. Not so anymore.
Also when I accelerate now sometimes when I lift my foot off the accelerator it bucks or jerks. It's not very violent but noticeable. I didn't experience any of these issues before the trip. I was wondering if the rocky back gravel roads of Nebraska could be a contributing factor in any of this or perhaps the steep hills of Rapid City South Dakota (SD was when I first noticed the reduction in coasting)
I've been in to see the Toyota Service department In my area and of course they told me that, "Those Prii just drive like that". I refuse to accept that since I am very sensitive to changes in drivability in any vehicle that I own and I know that my Prius operates and feels differently than it did before.
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I've had my 2013 Tiguan since July and have always noticed that it needlessly wants to downshift when going down hills. For instance, I might be doing 45-50mph down a hill... it'll be in 6th or 5th gear. If I tap the break, it downshifts. If I tap it again, it'll downshift again, to THIRD gear. The RPMs will shoot up to over 4,000. This also usually occurs if I put my foot on the break and keep there. So, if I'm on hilly roads... which is often being in Northwestern Connecticut, I'll engage the tiptronic.
Am I overreacting and is this just how the '13 Tiguan functions? Or is it a common problem with a fix?
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When I am on the highway, my 2005 Excursion (6.0) will hesitate/sputter/buck intermittently, usually between 70-80mph/ 1800-2200 RPM, but especially triggered by hills and inclines. Each sputtering episode usually lasts about 5-10 seconds and then will go away for minutes at a time. Does not sputter upon take off or initial acceleration. There is no smoke of any kind. Just got it out of the shop where the mechanic replaced ALL 8 injectors and the fuel pump, as well as flushed the fuel lines, and new fuel filters, and oil change (2 injectors were bad, but there was metal in the fuel filters, so to be safe I replaced all of them - ALL OEM PARTS for everything, including filters).
The week before, I had the IPR valve replaced. Also, recently had the back pressure sensor replaced and the EGR was deleted - and turbo cleaned when the EGR was deleted last month. I also tried unplugging the ICP sensor to make sure that wasn't the issue. Dropped $6k into this thing in the past month and about to lose my mind (and wallet). All research points to either clogged EGR or bad fuel injectors, but both have been addressed, so I am not sure where to look next. No current codes showing up. No signs of leaking oil.
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I have a 2002 camry with 212000 miles on it and just lately when driving at a constant speed 60 mph or over it starts to buck or jerk a little bit and you can feel it in the seat. I've had the throttle body cleaned and put in a new mass air flow sensor and it hasn't fixed it yet. What might be causing this? It doesn't do it when accelerating or slowing down.
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I just bought a 2005 Chrysler Sebring sedan 2 weeks ago, has 94,000miles on it. Had no problems with anything until 6 days after purchasing the car. I just got on the highway & was about a mile onto the highway & I was already up to speed 65mph & my whole car just starts jerking (bucking like a horse) & I let off the gas & it'd stop. I'd give it gas again & it would start to jerk(buck) again; I had to get to work so I drove it for the couple miles I had left to get to work.
As I got onto the off ramp I noticed my car didn't jerk/buck like it was at the higher speed. After work I drove back home & on the highway without any problems. I also didn't have any warning lights come on while it was jerking/bucking. (Before this incident, I had drove to my moms, which is 1hr & 45min away, & back with no problems). I took it to a local mechanic & they found nothing wrong, & they test drove it & checked all the fluids/filters/spark plugs. I did need new front break pads & rotors so I had them change those.
Four days later my car did it again.. the jerking/bucking. But this time it was at a low speed & I noticed a ding(like the kind of ding your car makes if you don't have your seat belt on), but again I saw no warning lights come on. I kept driving & was almost to get onto the highway & was about 20mph & my car started to jerk/buck again. I thought it might be nothing so I kept driving to get onto the highway. I turned onto the highway onramp & started going 20-25mph & my car started to jerk/buck like a horse & not let me accelerate any faster.
So I pulled onto the onramp shoulder & turned my car off then back on again & let it sit for about 5 minutes & got on the highway & it was like my car had magically been fixed. I got up to speed (65mph) just fine with no jerking/bucking. Again this time none of my warning lights came on & I didn't have any smoke coming out the back end. I of course immediately went strait home, but had not signs of the jerking/bucking. My car also when I start it, all of my dash warning lights come on like they normally would whenever you start up your car, so I know they all work.
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My mechanic told me that the fuel pressure is about 5psi low. Could this cause jerking/bucking during acceleration?100,000mi SS
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I have a bucking and jerking 6.0 right now. It will buck and then won't go above 2000 rpm or it will lurch or if I hold the pedal down lose power unless I drop it below 2000rpm. If I put the pedal down the truck wont go above 2000 rpm and will go up on speed. the erg was deleted but its trowing crazy amount of white smoke from the exhaust. When the truck starts up some white smoke comes out but eventually clears up when you keep it under 2000 rpm.
When on idle you can step down the pedal and hear the truck failing on revs like an injector issue but i checked and they arent the problem. the problem got fixed for a couple of weeks when i changed the Y pipe because the other was ruptured but the problem came back and its even worse now i can use the truck for nothing.
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I was driving the car yesterday and was getting on the highway ramp and stepped on the gas and car went crazy. It started to accelerate and decelerate by itself. I had no control of the car whatsoever. When driving at 0 to 40mph no problem so far, but anything over this car will jerk, like it's changing gears by itself, 'going fast and slow.'What is this? Do I need a fuel filter, or plugs or what? I don't know when the last time I changed anything the car mileage is 135,000
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About a month ago my Lumina (1999 LTZ 3.8L 85,000 miles) started jerking a little bit while slowing down almost like I was hitting the brake too hard and after 2 days of it the car would shut off while braking toward a stop sign or while idling and would to this without the jerk, no warning. I replaced the throttle position sensor hoping this would fix the problem, it did nothing. Soon after this the engine would jerk really bad while driving and shut off even during acceleration, the service engine soon light came on during this time. I took it to a local mechanic who said the error code was for a faulty mass air flow sensor, so that was replaced. This made things a lot better, no more dying or jerking while driving but there was a new problem.
When starting the engine cold no issues, when starting the engine warm after sitting 20-30 minutes it would shake and the RPMs would fluctuate by 300-400, but once I put it in drive and started going it would drive smooth. The service engine light came back on so I brought it back to the mechanic. This time they said the fuel pump wasn't pumping enough fuel (low pressure?) and it needed to be replaced so I did that but it created a new problem. When I would start the car cold the RPMs would jump way up to 2000 then down to 0 or it would jump to 2000 then down to 500 then up to 1500 then down and so on until I put it in drive.
So I brought it back again and they replaced a gasket around the fuel pump, put a new idle control sensor (i think?) and told me to turn the key to on, listen for the pump to stop pumping fuel and then start the car, I have never had to do that before all these problems. This worked fine for about 2 weeks and now I am back to the car shaking while starting it warm like it did before the new fuel pump and the service engine light just came back on. But again, once I start driving it runs nice and smooth like there are no problems.
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So, I was on my way back home driving through the middle of nowhere Utah late at night, when I had an injector tip crack. I was able to identify which one and unplug it so I could get to Grand Junction, CO (about 350 miles away) where I have family. After a power nap I started calling parts stores and found an injector from Advanced Auto Parts (I couldn't find a motorcraft reman, but I was restricted for time). Installed it and all seemed good so I hit the road again. However, nothing changed. It still had the bad miss (rough idle, jerking/bucking when the torque converter locks up) just like when I had the injector unplugged.
The truck is an early 2004 6.0. It's the number 4 injector. I finally got home and hooked up my AE scanner to discover a #4 injector circuit low P0270 code and circuit contribution/balance fault P0272. It's definitely missing because disabling it has no effect. This could be a loose connector at the injector or FICM, because I can't afford another injector right now.
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I have a 1999 Motor home has a 6.8L Triton V-10 just had a 100,000 milie tune up to include 10 new titanium spark plugs 3 months later I have this problem While driving the other day I had no power to take small hills. Little neighborhood hills were slowing me to 10 mph. Hoping its was the MAF sensor although it didn't throw a code when it was doing this but a code for PO358. So what's next back to the Ford Dealership for repairs?
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I own a 1986 Chevy Silverado C10. I have replaced much of the truck in the seven years i have owned it, including the engine about 35,000 miles ago. The modulator valve on the transmission became unbolted from the transmission housing a while back (the "tab" of the transmission housing actually cracked off). The truck lost power when this happened and most of the transmission fluid leaked out before i realized something was wrong , stopped and called a tow.
I replaced the modulator and secured it with a "Z" shaped clip made of roughly 10 gauge steel that bolts to the modulator and then to the frame that suspends the transmission. Then i noticed a loss of power up hill and the truck has trouble accelerating over 45-50 mph., possibly has trouble shifting into over drive "?".
I replaced the detent cable next, and changed the transmission fluid, filter, and gasket while i was at it. I have also replaced plugs and wires, and done a general tune up since then, but i still have trouble on hills and accelerating on the highway. I drive up a hill every day coming home from work and the truck slows to roughly 25mph, even if i start the hill at 45mph., and it climbs slow and seems very bogged down. Something to check before i assume the transmission needs replaced.
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The car has drastically dropped gas mileage from 17mpg to 11-12 mpg. It's laboring, and I even have to accelerate going down hills where I am usually breaking to keep from going too fast. I have had the whole car looked over twice -- timing belt was a little old, so we replaced it. The gas filter was full of gunk, and it was replaced. Still has the same problem. Mechanic can't find anything else wrong. I'm getting ready for a long road trip and don't want to pay for all that gas or break down along the way.
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I have a 2008 Nissan Sentra with 90-something thousand miles on it. Last summer I moved from Texas to Oregon, so it went through 125° Arizona heat (during which overdrive stopped working for a while) and mountains for the first time. Ever since then, if starting from a parked position, I can't go over hills or bumps or even curbs. I can IF I was already driving on a flat surface. But if I stop on an incline and then try to drive forward (or reverse up it), I can't. The RPMs don't go above ~1.5k until I'm back on a flat surface.
The check engine light is on, and has been on since last summer, but the code it spits out is something dealership specific. People have told me it "might be something with the transmission". The problem hasn't gotten better or worse since last summer, so I just ignored it and got really good at not stopping before steep inclines or hitting curbs or anything (lol). But if I ever need to, I'll be in huge trouble. I can't even drive over medium sized rocks if I park too close to them.
The first time I found out about this was when I pulled into a friend's downhill driveway last summer, and then couldn't reverse out of it. He had to push it back up.
Note: from a stop, it will go up GRADUAL hills and over SMALL bumps just fine, but anything that takes more than 1.5k RPMs to overcome isn't happening. It will go up steeper hills and larger bumps (and curbs) only if I was already driving, but it still can't tackle the steepest mountain road inclines like other cars can.
The 1.5k RPM problem goes away when it's on a flat surface (or if I started driving on a flat surface before encountering a hill), and it accelerates normally again. However... It also takes a couple of seconds to rev beyond 1.5k RPMs after stopping at a red light.
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165k miles 4x4 6 speed, bone stock unmolested
Slowly progressing problem over 6 months. Occasional miss at highway speeds uphill has progressed to bucking and jerking during even gentle acceleration attempts.
I hadn't got my cam sensor recall done but no change after that procedure completed yesterday. Oil recently changed as well.
I have a torque pro but it never finds any fault codes even though 'service engine' light comes on sporadically. I'm not sure I'm operating it properly but it at least reads rpm when its running.
I'm contemplating the hutch mod but I'd like to have an official diagnosis beforehand if its possible in my case.
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My 2005 Elantra is jerking soon after I accelerate. It does not jerk at any other time. It's not a hard jerk. Sometimes it doesn't jerk at all after acceleration. When it does jerk, the rpm jumps up too, and goes back down after the jerk.
I took it to a transmission shop and they checked the fluid and used a diagnostic thing to check the electrical components, all of which were fine. Is there another possible reason for this jerking?
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An independent mechanic rebuilt my 2001 Honda Accord transmission.
The first problem I had with my car shifting was when I tried to pass a car. The car kind of bucked and would not accelerate enough to pass cars. The fix engine light was on. I took it to a small town mechanic who did some diagnostics and said it was not the transmission. He reset the engine light but it came back on as I was driving home ( 150 miles away). On my next trip downstate ( 150 miles) I had my oil changed. As soon as I left the oil change place my car would not shift from 1st to 2nd gear consistently, and once it dropped into neutral then kind of slammed into second. The D4 light was blinking. This happened inconsistently, but I did not drive it more than 10 miles.
Being 150 miles away from home, I didn't know where to take my car. The local KIA dealership said they could get the diagnostic codes for me but could not fix it. After diagnostics they said the codes indicated some "sort of trouble with the transmission" but couldn't tell what. I called the closest Honda dealership and an independent transmission specialist. I gave both places the codes. Both said it sounded like a transmission problem but couldn't say for sure until they saw the car.
The transmission guy warned me that when people bring their vehicles in for a second opinion, the dealership always recommended very expensive full repairs that are not needed. He told me I should not drive the car, even though it was drivable, (since the problem was intermittent), so I had it towed in to him in the closest big city. He said he would check the car over ( I have a gas leak, some inconsistent electrical problems and my oil light had come on before I had the oil changed) to see if it was worth the price of a repair and call me. I made the 150 mile trip home and waited four days before I called him, since I hadn't heard him. When I called him, he said ,"the transmission rebuild was almost done". He said second gear was "burned out". I was ticked because he did not call me or give me any details ahead of time or put anything specific in writing for me. He said he could "take it back out" if that is what I wanted. I didn't know what to do, so I told him not to take "it" back out.
I picked up the car on Saturday and drove it 15 miles. It worked fine. The next day I drove the car a block and it did EXACTLY the same thing it did before I had it "repaired". The car would not shift from 1st into second.. then it kind of dropped into neutral then clunked into second gear and the D4 light was blinking. When I called him he said he would have to look at it to see what the problem could be. (electrical or something else).
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I have a 02 gti with 1.8t and tiptronic trans. Anyways my gf said she was driving and traction light/battery light came on car started slowing down when she tried to accelerate. Said brakes were stuff to and car shut off..what would cause this. I had a maf code over the weekend i cleared.
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I just bought my 2007 Chevy Aveo about a month ago. When I got it it had 79k miles on it. I've put almost 1k so far. When I got it I noticed it did this tiny jerk thing when it got up to 50miles/hr but then stopped after I passed that. well lately its been jerking when I start the car and accelerate. Eventually the jerking subsides but the makes this weird noise when its just running. almost like it's struggling. today in particular it did its jerk thing and my check engine light started blinking. it blinked til i got to the store (~2miles) and when I started the car again to go back home, the blinking was gone. What the problem is?
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When I accelerate lightly and when the Eco light is on, u can feel a shaking or jerking in the gas pedal? But when I accelerate harder it stops. It seems to happen under light acceleration through most of the gears?
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2002 Jetta 2.0.... car was jerking when accelerating and check engine light was flashing, severe loss of power and when stopped at lights it would shake and the rpms would drop and go back up... took it in and was told to get the coil pack replaced. One week later new coil pack - check engine light is back on and yesterday same problem (car was idling rough, and severe jerking/flashing check engine light happened again). Took it to autozone to read the code it is giving P0420.... The shop said i might need new plugs and wires, which were replaced with bosch parts one year ago. Any chances these went bad so quickly?
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