Prius (Gen 2) :: 2009 - Subtle Stammer On Freeway At Speeds Between 50 And 80 Mph
Apr 14, 2011
Just bought certified preowned 2009 Prius from dealer. Never had one before. I did test drive it for 20 minutes before purchase. But on the way home from buying it today I noticed a constant and subtle "stammer," on the freeway at speeds between 50 and 80 mph, like as if the car was very slightly and frequently shifting in speed even though the accelerator was in a constant spot and the road was flat. I watched as the display constantly shifted, like many many times per minute, where and how power was being generated/used.
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I have a 2010 Prius no frills model with 5500 miles on it. I've started hearing a noise that sounds like loud burst of radio static. I hear it with the radio off or on. It's very intermittent, but seems to occur only at freeway speeds. Seems to be coming from underneath the shifter or underneath the dash in the same area.
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I've been noticing some weird, very subtle engine sound changes while driving at highway speeds lately. Something almost like surging, but not. I don't know how to describe it. I might try to make an audio recording next time I take it out so I can explain it.
Anyway, I don't know why but ICP popped into my head. Maybe, for some reason, the engine was varying ICP causing the surging sounds.
So I hooked up AE and did a test. I've attached a screen shot.
With my idle speed actuated as high as it will go, and ICP actuated as high as it can go, I can only get a pressure of about 1450 PSI. I always thought ICP should go higher than that. I seem to recall reading somewhere around 3600 PSI.
So am I misinformed, am I reading the data wrong or do I have a problem? How high should Injector Control Pressure go? I missed it in the screen shot, but ICP is actuated to 100%.
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Just bought a used 09 Corolla LE with 89K miles on it. I noticed a subtle rough idle when I come to a stop light and especially noticeable when in reverse. Here are the things I've tried so far:
- TB and fuel system cleaned at Instant Valvoline
- Cleaned the MAF sensor with a MAF sensor cleaner
- Replaced the spark plugs with OEM plugs
- Replaced air filter
- New water pump
- Bled the coolant system
I also took it to the dealership and had them checked the PCV and the timing chain tensioner replaced. And of course their response was they couldn't replicate the problem. They also said if there's anything wrong with the O2 sensors, the IAC or the TB system, it will throw an error code. So they basically charged me about $100 to tell me there's nothing they could do and just put up with it until the check engine light come on.
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So yesterday afternoon I went outside and started my truck up. Upon starting it up and flipping the AC to high I noticed a clicking sound coming from somewhere inside my dashboard. It did not change in rhythm regardless of what setting the blower was on. But it remained for a couple of minutes before it subsided.
For the record it wasn't a subtle clicking...It was a very obvious sound. After the noise went away I continued to use the AC and it worked just fine like it always has. What it could have been? 2011 F-150
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I have a weird vibration only at freeway speeds. It's a vibration that lasts 3 seconds but are consistently 2-3 seconds apart. It's a very suttle vibration and can be felt at my feet and slightly on the wheel. My passengers can feel it if I mention it. The key thing about the vibration it's starts and goes away the starts and goes away?
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I'm still getting the occasional "slam" as I decelerate from freeway speeds as the trans downshifts from 4-3. Service writer says VW is aware of the problem and are working on a TCM reflash.
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I have a 2000 6.8L V10 Ex, and I'm currently working through the last thing on my "to fix" list. The truck has 37" tires (Nitto Mud Grapplers), and at freeway speeds the speedometer is off by 10mph. If it reads 60mph, I'm really going about 70mph.
I thought the solution was to order an SCT flash tuner, so I purchased one with tunes from 5startuning:
**1. SCT 7015 - X4 Flash Device with Choice of 5 Star Tuning Custom Tunes - 5 Star Tuning
I choose the correct Revs per mile for my tire (560), but the speedo is STILL 10mph off at 70mph.
No changes that I made to the tire size or axle ratio made any difference. It always read the same amount off. The SCT X4 flash tuner wasnt able to change the speedo on the 2000 Ex's.
[URL] ....
My question is this: If both of those tuners plug into the exact same port, and use the same parameters, why is it my X4 tuner can't change the speedo, yet this other tuner is able to? It doesn't make any sense to me. If the X4 truly cannot change the speedo of certain model years, there should really be a disclaimer about it. Feels like a bit of a rip off since the only reason I purchased it in the first place was to correct my speedo...
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I purchased a used 2010 Toyota Corolla LE with about 40k miles back in February of this year. Since then, the car has been issue-free and has responded accordingly.
Two weeks ago I noticed that the car when idle or at a stop light it'd make a subtle rattling noise (as if it was something behind the glove compartments rattling against metal). At 1st I thought maybe it was something inside, but as that week turned to days, I noticed that while I was outside the car and it was on and idle, I could hear the rattling from the right side of the car under the passenger seat (closer to the engine, as if right below where the glove compartment sat)--It is a constant rattle at the same frequency..meaning it doesn't rattle one way 1st and then another later. It sounds the same, but it is random.
It evolved from a subtle rattle inside to being a loud rattle outside under the car. I noticed that if it was rattling and I turned off the air, the rattling would stop, but after 20 seconds, the rattling would return just not as frequent.
It was advised to me that perhaps it was the blower...but the blower sits behind the glove compartment and should not sound so loud under the car. Not only that, but if the blower isn't on (when I turn off the air) it shouldn't sound...at least that's my logic for it.
The sound is getting louder and more frequent at this time and I'm just not sure what to do about this. I don't know what this rattling is and I've already crawled under the car and see nothing wrong, nothing shaking violently, nothing.
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I have a 2000 5.2 ltr. Dodge Ram Van. Only in overdrive, only with the cruise on, there is a slight hesitation at freeway speeds every few seconds. The Chrysler dealer said it was the overdrive clutches going bad, to the tune of trans rebuild. Guess what? It didn't fix it.
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I recently bought an '09 Santa Fe Limited. I want to love the vehicle, but I've got a problem with how it drives. Basically, here are the symptoms:
1. Engine RMPs dance around about 200 RPMs at idle. (I was told this is normal. I don't think it should be.)
2. Under normal acceleration, it bogs down immediately after shifting into 2nd gear and after a couple of seconds there is a surge and acceleration seems "normal."
3. Occasionally, I feel subtle fluctuations or surges in the engine under both acceleration and/or cruising speed (any speed, really.) It's like I'm feathering the throttle when I know I'm not. This is most pronounced when under a load, such as taking off from a stop sign at the bottom of a hill and accelerating up the hill.
So, here's what the dealer has done to address the issue.
1. According to the Carfax report, the previous owner had the throttle position sensor replaced at 22,000 miles and again at 27,000 miles. I bought the vehicle with just over 30,000 miles (certified pre-owned).
2. On the day that I bought the vehicle, I noticed the issue and the service manager took it for a test drive with me. He told me it was wind buffeting that I was feeling. I thought that was bunk, but with it being a higher profile vehicle, it put some doubt in my mind. He went ahead and flashed something to reset the adaptive learning module that supposedly adjusts something in the engine based on how you drive. It seemed better after that, so I went ahead and bought it.
3. After a few weeks of driving it, it became clear to me that it was definitely not wind buffeting, so I scheduled a service appt. It was taken for an "extensive" test drive (according to the service record) with a diagnostic computer connected. Apparently, the service technician said they were only able to find one small blip with the mass airflow sensor, so they replaced it and called it fixed. I should also note that at no time, have any codes ever shown up when they check for error codes.
4. Although it seem slightly better, the problem still exists. Just for kicks, I dumped a bottle of Seafoam in the gas tank with my last fill up, but that doesn't seem to have made any difference.
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I have a 2002 4Runner that has recently developed a vibration at freeway speeds. I purchased new tires about two months before the vibration started. I have been back to the place where I bought my tires and the assure me that they are balanced.
I have been dealing with this problem for the past couple of months and have been getting nowhere. When I took my 4Runner into the dealership to get the lower ball joint replaced I spoke with the service folks about the vibration problem and all I got in response was "we've never heard of that before".
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Have excessive cabin wind noise in your Gen 6 when travelling Freeway speeds. I know there would be some noise but when passengers mention it and we talk louder than normal then i think its an issue. It is kinda loud now...
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2011 Camry LE with what I would call a mushy or sloppy feel to the steering. It is most noticeable at freeway speeds and requires an almost constant driver input to maintain the car in my lane with slight corrections back and forth right and left. This is fatiguing on long drives. It feels like there is too much power steering assist at higher speeds, although an independent mechanic said he didn't think it has variable assist power steering. There is no pulling in one direction. Alignment has been checked and it's ok, and tires are balanced and properly inflated.
Strong wind or large trucks passing me cause me to struggle to maintain the car in it's lane. Toyota dealer mechanics and the Toyota rep checked it and gave me the "drives as designed" answer and that there is nothing wrong with it. I had an independent mechanic look it over and he said there is nothing wrong and that there is nothing that can be done to change the feel of the steering. It is hydraulic steering and not the electronic power steering. I have test driven other Camrys as well as Corollas and other makes of cars and they all drive with a more sure feel to the steering and I just want my Camry to drive like that.
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I can hear a drone at freeway speeds coming from the engine compartment of my 99 Passat 1.8. I don't know whether this is normal, but it seems like the down pipe has a resonance/vibration. How to reduce this? Test pipe? Header wrap? Or is there something wrong that I have this buzzing?
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2007 Hyundai Elantra, gets this noise/squeak when around freeway speeds.
I took this short video, squeaking starts around half way in: Video - TinyPic - Free Image Hosting, Photo Sharing & Video Hosting
This is a really annoying noise .
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OK so here's the deal. Driving around town @ lower speeds I've yet to have this problem. When driving at freeway speeds seems like between 1/4 tank & reserve all of a sudden the power just drops off . I mean like the ignition has been turned off. No throttle response .. nothing..... just begins coasting & dropping speed. When throttle is depressed... totally dead. This lasts for about 5-10 seconds then after coasting & looking where to pull off the highway all of a sudden the engine kicks back in like nothing ever happened. Where to look for Jetta MK 4 18T Fuel supply problem??
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My 2002 Toyota Highlander burned up to a quart of oil very 300 miles when on a recent long distance freeway trip. It must be burning it out the back as there is no drip. Clearly, there is a leak, but why only when driving on long freeway trips? Can this be due to pressure build-up and a clogged PCV?
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When I bought my car (used of course) the guy told me that they had replaced the water pump and the timing belt. When I test drove it everything felt great. turns out that after about ten minutes (cold motor) when the temp gauge reaches midway it starts to stammer on acceleration. this was last friday. yesterday on my way home from work my gas light had come on. I was going up a hill when the CEL lit up. I got gas this morning on my way to work. at one point i had to hammer it a little to get out in front of someone. thats when the once solid CEL began to blink.
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I have a 2001 F150 4x4 supercrew XLT 4.6 with 150,000 miles. I have a few things happening in the truck, and although it is still running for now, I would like to get ahead of this before something catastrophic happens, and I don't know if everything is related, or everything is falling apart separately.
1. I have been noticing a burning smell coming from under the hood after driving, every time I drive, but no noticeable leaks, and oil level is fine. I have seen light smoke coming from the exhaust but inconsistently. A mechanic said it was probably the valve cover seals leaking to the manifold, but I would think there would eventually be less oil on the dipstick?
2. When on the gas, over 2200 RPMish, the air and AC switches to defrost. It seems like a vacuum line leak somewhere, but can't find it.
3. Generally, the truck seems sluggish, sometimes unwilling to shift gears or accelerate at freeway speeds. Not sure if its the transmission going out again (had it replaced at 125000), or spark plugs?
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I have a 2006 F250 Lariat CC FX4. I bought the truck with 68,000 miles about 3 months ago. This is my first 4WD and I'm wondering if I need shocks.
I know how to check on a car but this suspension is too stiff to push down a corner so how do you test? Or do you just go by the age? At freeway speeds when I hit a bump I get a bit of a shudder that makes me wonder if the axle is hopping.
If I were to replace them are the Rancho shocks OK for a replacement? I will spend very little time off road and mostly use this truck for boat towing and hope to buy a travel trailer down the road.
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