Sonata NF (2006-10) :: Sputtering At Highway Speeds
Sep 13, 2015
My vehicle works absolutely beautifully except between 75 and 105 km/hr where I experience sputtering. This does not happen under load but just when I am maintaining a constant speed. It feels like misfires but I don't get a check engine light when it occurs. Misfires would definitely trigger the check engine light. I've tried the obvious solutions:
Used fuel system cleaner in case I got a bad tank of gas
Used fuel additive to eliminate any water in the tank
Changed the oil and filter (it was due anyway)
Replaced the air filter (it was also due)
Cleaned the MAF Sensor
Replaced the spark plugs
None of this has made any appreciable difference in the performance of the vehicle. The sputtering persists.
The car does not have traditional spark plug wires. Instead it has ignition coils which run about $140 each from the dealership. I may eventually have to change one or more coils but I'll try cheaper solutions first.
My next step is to replace the crankshaft position sensor. You may have noticed that I am problem solving starting with the least expensive solution and progressing to more expensive repairs.
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When I'm driving at a certain speed (usually between 65-70 mph), my 06 Sonata GLS V6 develops a really soft (but really annoying) high-pitched whine that decreases when you take your foot off the gas. Not much at other speeds (sometimes it will kick in real quick at high rpm before the automatic trans shifts), but when the car hits 66-67 mph that little subtle whine kicks in. By 75 mph, it's gone (I drive 75+). Sounds just like a high-pitched dog whistle.
Not a wind noise....sometimes it sounds like it comes from below me, sometimes it sounds like it's coming from the dash. Dealer don't hear anything (of course), even when I'm in the car with the tech and can hear it (maybe I'm part dog.....who knows).
Here's my guess.......I think that it's the electric fuel pump. Sometimes if I'm outside the car, I'll hear a whine back in the fuel area that is almost the same pitch as the whine I hear at 70. Since the whine varies (or disappears) with engine rpm and application of the gas pedal, my thought is that I'm hearing the fuel pump hit a certain pitch, which causes the whine.
2006 Sonata?
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I have been hearing an intermittent high pitched squeal at 50 MPH and higher. Taking my foot off the gas or taking it out of gear doesn't change the noise. Hitting a bump or tapping the brakes makes it stop momentarily. It sounds like it is coming from the front driver side, though it's hard to tell.
I have about 33,000 miles on the car. My manual says that the brake pad replacement indicator should squeal when the brakes are applied.
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This has happened multiple times but this last time was the dangerous one. I was driving home from work on Friday on the tollway which is very straight but does have some slight turns in it (construction). So I am at highway speeds for some time and one of these slight turns comes up. I try to turn my wheel but nothing happens. I apply more and more force until it finally decides to turn and by that time I am applying so much force, it jerks really hard. If the car didn't finally decide to turn, I would have hit the highway barrier. I am lucky that no one was next to me or I might have hit them.
-This only happens at sustained highway speeds, city driving is perfect.
-It doesn't happen every time I am on the highway, it is intermittent.
-It does not have a bias with regard to direction (left turn or right).
-I have put some Mobil 1 Synthetic ATF in my reservoir to add fluid to my system with whatever was currently in there when I bought the car @ 75K miles. Car currently has 130K miles. Is there some sort of write up for PS maintenance/flush? I need to pull the return to drain, right?
-I do have a rubber on rubber squeak sound in the front right when I go over a bump.
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I've been having a problem which i cant seem to find the fix for. My ABS and ECS dash light keep turning on. Its intermittent and does not stay on. Ive noticed that it usually happens if I travel at highway speeds for more than 15miles. I had the brakes x4 changed 1 year ago and all brake pads show good life. Brake fluid is at a good level with no leaks to be seen. I am wondering if its one of the sensors? How can one check for that? I have a 2006 3.3l GLS with 86k.
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I recently bought a 2007 Sonata V6, and the brakes pulsate (when applied) at highway speeds, so I am looking to replace the front rotors & pads. I have been told that the OEM rotors/pads aren't great & that as a result many owners have a brake pulsating/vibration issue.
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I have a lot of wind noise in my 2 front windows when driving highway speeds, no water leaks. I cannot find where it is coming from either, I assume it is either air rushing over the mirrors or thin glass. Sometimes it is worse than others, not sure if cross winds etc. Is that common in 2009 Sonata. My old 2003 Malibu, much quieter but mirrors were slightly more rounded if I remember.
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So about 5 months ago I started feeling vibrations in my seat and steering wheel. I got my tires road force balanced and it solved the issue. I just got back from a weeks long vacation in Maine. Before I left I had the tires road force balanced again to ensure a smooth ride up. I left some shaking in my seat so I wanted to get it ironed out.
While driving up my seat and the entire cabin shook when I exceeded 70 MPH, it got worse and worse the faster I went. The steering wheel didn't shake at all. I figured the tech balancing the tires did a bad job so I visited the BJ's in Portland. They re-balanced all my tires, I was present when the job was being done and noticed they were all out of balance.
The BJ's tech said it look like the shop that did the balancing over balanced each wheel (too much weight on each wheel). As soon as I hit the highway the same thing happened, shaking above 70MPH. At this point I determined it was probably a bent wheel. I visited a local wheel repair shop, they checked out both my rear wheels, since the steering wheel wasn't shaking I didn't bother checking the front ones.
It turns out both rear wheels are ever so slightly bent, they attempted the straighten out the more bent one. They tech repairing the wheel said he was surprised I even felt anything at all. So I had my hopes up that the problem would be fixed but as soon as I hit the road the same shaking returned. At this point, what's wrong with my car. I'm thinking of buying 4 new wheels, the car came from the factory with low profile 18 inch wheels which have been a curse.
A few more details about my car:
Toyo Proxes 4 Plus - Ultra high performance tires (Maybe contribute to harsh ride?) 20K miles on them
Installed thicker 20mm rear sway bar 6 months ago (But I never had shaking until now)
Installed front tower strut bar 6 months ago.
Total mileage 32K
I have hit lots of pot holes the past 2 winters lost 2 OEM tires and bent 1 wheel last year which was repaired.
Also I can't drive through it, the shaking doesn't stop with more speed it only gets worse. And the back end has started to feel squirrely over bumps.
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My sonata has started having issues on the highway at speeds ~65-75 mph. It will start vibrating, a little at first and gradually getting worse. As this happens my brake pedal seems to be more firm and touchy rather than soft and needing more pressure to stop. The vibration can be felt in the steering wheel and the floor as I drive. This has happened twice so far, with a gap of about a week in between incidents. What should I get checked out?
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My daughter just bought a 2106 Hyundai Sonata Sport loaded. Within one week of driving it she noticed a lot of front end vibration at highway speeds. She took it back to the dealer. They test drove it and figured it needed an alignment. It didn't fix the problem. Hyundai corp was notified and the gave permission to put on 4 new tires in case there was damage from the original wheels sitting. Still has not corrected the problem. They have one more try before I demand lemon law and require a new car replacement.
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My new Sonata Limited 2.4 has 17" wheels and Kumho tires. On certain rough concrete, or more often asphalt road surfaces, at highway speeds, this car is so noisy that one can hardly carry on a conversation. It's terribly loud. Dealer has "checked" it, and tire dealer has looked at the tires. No problem has been found. What can be done about this?
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So I have a little weird issue. My car has been sputtering a little when sitting idle at lights and such. But once I fill it up with gas the sputtering is even more noticeable. What this is?
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I have a 2006 accent 1.6l dohc. While doing highway speeds the rpms are very high considering the small engine. There for it give me a result of bad fuel mileage with 480km per 40l tank. I'm curious is there is any 6speed transmission I can swap out my 5 speed with in order to give me that extra gear to bring the rpms down.
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Have a 2008 Elantra GLS with 63K miles. A/T was serviced by dealer at 51K. Car now occasionally downshifts from 4th to 3rd when driving between 60 and 70 mph. Happens only when trans is hot (after 2-3 hours on hiway). When it occurs, it searches for the right gear, going back and forth from 3rd to 4th for several minutes before returning to normal. One thing odd is if I shut the car off for 5 minutes after it occurs, it runs fine afterwards. Do I need an ECU update or do I have a A/T problem?
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I just bought a 2011 accent 5 spd ... Quick question, when I drive it at highways speeds. (65mph) I notice that i am running around 3500 revs. Is that normal? It seems a little high to me. Every other 4 banger I had never ran that high in 5th gear at 65 mph.
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My tires are cupping on my Azera. I've had the tires rotated every 7500 miles as required by the maintenance schedule. The tires make a lot of noise while driving, especially at highway speeds.
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2006' screw, 5.4L, 116K miles ... The truck looses power at highway speeds to the point that I need to pull off of the road. When this happens the check engine light is on and the truck is still running but will not accelerate, is it possible the computer is going into limp mode and if so what would cause this?
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So I recently took over my wife's 06 GLS 3.3 and gave up my 3.5L Saturn Vue Redline - Any ways the sonata has 60k miles on it and vibrates on the highway around 65-70 mph. Are there any other things I should be looking on with this car?
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2006 Sonata GLS 3.3L v6 ... Vehicle has 192,000 miles and generally runs well but has started stalling out on the highway. Seems like it stalls more when turning on an exit ramp or after going over a rough spot or pothole on the road but not always. Not sure if anything in particular leads up to it. The car stalls, the power steering and brakes become unresponsive, all the dashboard lights come on, and I have to pull over and stop completely to try restarting. Usually starts right back up but sometimes it takes several tries. Took it to AAA auto care but since they couldn't recreate the problem, they weren't able to identify the issue. They did say that their diagnostic equipment was unable to access/communicate with the on-board computer for the engine if that makes any sense.
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I think my fan switch is bad in the car. the fan will work on all speeds except low. On low it only works when it feels like it. How hard are they to fix?
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Is it normal that while driving I can see my headlights wiggling? I have only noticed it on the highway and it is on all types of highway surfaces. I wouldn't doubt it if it was also happening on regular streets as well.
What I mean is that while driving at night on the highway if I look at highway signs or big rigs in front of my car I can see the lights shining from my headlights and they are shaking like crazy.
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