Sonata NF (2006-10) :: 2007 - Rough Idle And Bad Acceleration But No CEL
2007 Sonata V6. He's spent many hours and a good chunk of change at the dealership trying to get it fixed and nothing has worked yet. They honestly have no clue whats wrong which kinda scares me.
First off here is his problem. Occasionally when he starts the car it will idle very rough and struggles to accelerate to 30-40mph. When this happens he pulls over and shuts the car off for a few minutes then it will run fine again. When all of this happens there is no CEL or any light at all that flashes or comes on the dash.
Here is a list of things that have been replaced
Fuel pump
Throttle position sensor
Crank sensor
Plugs, wires and coil pack
Sonata NF (2006-10) :: GLS Having Unusual Noise During Acceleration
My 2010 Sonata GLS recently started to emitting some noise during acceleration, seemingly come from under the hood. The noise is most noticeable between 15-25 MPH, and is more noticeable when I go uphill. The noise also becomes more frequent with higher speed.
I have a shared m4a file with the noise recorded on Google Drive [URL] ......
Sonata NF (2006-10) :: Rattling Noise During Acceleration And Only At Just Under 2000 RPMs
I have a 07 Hyundai sonata that has a rattling noise only during acceleration and only at just under 2000 rpm's. I went to a mechanic who checked the heat shields and exhaust only to tell me it was in the transaxel and sent me to a transmission shop. the transmission shop told me they think its the hydraulic lifters, and sent me elsewhere.
View 1 RepliesSonata NF (2006-10) :: Dry Start / Rough Noise After New Filter?
Maybe I'm paranoid but after changing just the oil filter, the engine started to make nasty noises for 5 seconds. Could this be symptoms of a dry startup? If you didn't read the thread, I changed the oil filter only because the Bosch oil filter was making my engine noisy. I changed to OEM Hyundai filter. I even put engine oil in the filter before inserting it into the engine. Does dry startup happen to all cars after changing the oil filter?
I came across another thread this morning after encountering the same issue with a Bosch filter (the cloth one) It doesn't have a lip on the top/bottom and uses a fiber on both ends instead (Which I'm assuming is causing a dry start). I also encountered some nasty noise on startup after installing this filter for the first time (usually use WIX/Fram Extra Guard) as per availability. Bosch just has a different design (cloth on the ends compared to plastic lip). I suppose I'll be picking up a new filter after class today.
Sonata I45 (YF - 2011+) :: Uneven Acceleration / Idle Rough
My 2011 Sonata 2.4L GDI has already 76k miles. Spark plugs were replaced around 75K miles, Air filter was replaced. Fuel treatment was done several time since ownership, Intake CRC for GDI was used once about 2K miles ago. The car is doing good until recently. When I accelerate the car acceleration goes uneven. It is not like hesitating but you feel like the car is taking it in steps. Sometimes the first run in the morning, the car idle feels a little bit rough but that's only in the morning. It has been like that for a month now. What do you think it can be? No Check engine light, no pending codes and nothing major except that. I really suspect a bad upstream oxygen sensor (Air fuel ratio sensor). What do you think?
A look through the intake shows a very clean intake. No signs for any carbon deposit. A Hyundai dealer checked the car and told me there is nothing to worry about. Just told me to buy more Hyundai fuel treatment (AKA Chevron Techron) which was done and still I feel uneven acceleration.
Accent MC (2006-11) :: Rough Idle - No Power Or Acceleration When Driving
I have a 2008 Accent SE and I'm having some issues... The car was driving fine the other day all the sudden check engine light came on started flashing then and just stayed on. This happen before and the car was under warranty so the dealership fixed it but now it ran out and it's happening again. Anyway the car is running very rough at idle like the car shakes and acts like it doesn't want to run. Also when driving it honestly feels like the car has no power or acceleration what so ever. I replaced the air filter with a brand new K&N filter, I also changed the spark plugs today. I put NGK's in and the problem is still the same. I had it hooked to a code reader and it said I had a misfire in cylinder 2. I thought the plugs would have fixed it but I guess not.
View 9 RepliesSonata NF (2006-10) :: Jumpy On Acceleration From A Stop
When I accelerate from a stop, the car jumps, slows down, jumps again, etc... I do hear a noise when I accelerate rapidly on the highway, almost like a leak somewhere, but I'm not really sure.
View 3 RepliesSonata NF (2006-10) :: GLS Hesitation On Hard Acceleration
I have a 2010 Sonata GLS 4-cylinder approximately 124K miles which has been hesitating on hard accelerations for about 8 months. It will usually do this when getting on an on-ramp for the freeway or if I need to do a U-turn and get up to speed quickly. What happens is I punch the gas and the vehicle acts as if it's not getting any gas and hesitates or stalls and then it finally takes off. Usually I see a cloud of grey/white smoke behind the car enough that I am unable to see any cars in my rear view mirror.
I do not seem to see a difference when the vehicle is warm/cold. I do not have a CEL nor have had one. I have replaced the MAP sensor, PCV valve and spark plugs (properly gapped). I have done a compression test and am getting roughly 180-185 psi per cylinder. I am not experiencing any oil loss/coolant loss, do not see any oil in the coolant or gummed-up or oily spark plugs. I have also replaced the transmission fluid, doing a drain and flushing the torque converter. I have also cleaned the throttle body, and am using a new air filter and the oil has been changed within the past 1000 miles.
Sonata NF (2006-10) :: V6 3.3 NF Elite - Vibration Under Acceleration
My 2005 3.3 V6 NF Elite has developed a vibration under acceleration. Its not always apparent, but certain road surfaces, and certain rates of acceleration seem to make it worse, when it can be felt throughout the car. The drivers side CV is beginning to click, so will need replacing soon, and I suspect that some bushings around the suspension are worn, as they are squeaking. Could those issues cause such a vibration.
View 5 RepliesSonata NF (2006-10) :: Power Loss While Acceleration
I was cruising on the highway and tried to accelerate and no more power. Could feel engine losing power. After I shutdown the car and start again, car was fine.
View 3 RepliesSonata NF (2006-10) :: Hard To Get Gradual Acceleration
Still getting used to my 2010 2.4 Sonata>Seems hard to get gradual acceleration when I depress gas pedal,instead I get Jack rabbi t take offs ,I wonder if linkage needs to be adjusted.
View 12 RepliesSonata NF (2006-10) :: Vibration During Acceleration Evident In Second And Third Gear
My car has been vibrating under acceleration since past 2 months. It isn't present in first gear but is evident in second and third gear ,and increases with more acceleration. I replaced engine mounts as they were shot,and got the wheels balanced but the vibration still persists
View 6 RepliesSonata NF (2006-10) :: Rattling / Grinding Sound During Acceleration
I have a 2008 Hyundai Sonata GLS 2.4L with 131,000 miles on it. When I accelerate from a stop, there is a buzzing/rattling/grinding noise coming from the engine bay of my car. It's really hard to describe, there is a definite buzzing sound, but also almost like there is a bolt rattling around and banging into things. This only happens for a couple of seconds. It also seems to be worse when I'm accelerating up hill. If I accelerate slowly from a stop, the noise does not occur, and it also does not occur if I accelerate while I'm already moving.
View 4 RepliesAccent MC (2006-11) :: 2008 GS - Misfire On 3 Cylinders / Rough Idle And Poor Acceleration
After scouring through hundreds of threads on this forum (which is Awesome, BTW), it seems as if this misfire / rough idle thing is fairly common (which is scary!!). CEL is on steady. Had the codes pulled; P0301, P0302, P0303. At the recommendation of the mechanic, I had the plugs replaced...no improvement. He then replaced the ignition coils...no improvement. Just finished replacing the MAP sensor. This actually had a VERY temporary positive effect. However, after about 5 miles of driving, the misfiring returned. Took the car to the Hyundai dealership, and they acted as if they didn't want to fool with it. They referred me to a couple of local repair shops...????
View 8 RepliesSonata NF (2006-10) :: Engine Missing Around 30 Mph But Not Detectable At Idle Or During Acceleration
2006 sonata 3.3L has an engine miss that is most prominent around 30 mph but not detectable at idle or during acceleration. It has new plugs that are properly gapped. Transmission fluid is good and fresh. I even checked the ignition coils and had all about .9. I even changed the fuel filter. What else could it be?
View 7 RepliesSonata NF (2006-10) :: Check Engine And ESC Lights - Poor Acceleration
Check engine light came on momentarily, car had poor acceleration. Light went out and ESC light came on. When the car was turned off and restarted, the ESC light went out.
I scanned the engine, no codes, either open, pending or historical.
Question, could the issues with the two lights be related? Or is there anything else I should check?
Sonata NF (2006-10) :: 2007 GLS - Slow Acceleration And Poor Mileage
2007 Sonata GLS - I4; 55kmiles ... I plan to sea foam on my Sonata as it continues to have slow acceleration and poor mileage. Looking for a picture of the Brake Booster or Vacuum line? I want to make sure I am pouring it in the right place.
View 3 RepliesSonata NF (2006-10) :: Acceleration Power Suddenly Lost - No Engine Light
My problem is on wed I was driving my car,when I suddenly lost acceleration power, after pulling over to the side of the road I turned off the car and restarted it. However I still had the same problem with acceleration. After a while of trying to get the car to start I called a tow truck and got it towed to the dealer. When I got there they told me it was likely and issue with with a sensor on the gas pedal and the engine. At the dealership I started the car to show them the problem however the car drove perfectly and no engine light came on.
They told me it was most like what they said over the phone the sensors. However on xmas eve they called me and left a voicemail saying the rear cat had went out and taken out both rear exhaust manifolds and it would coast $3000 to fix. My question is how can all that happen without the checking engine light coming on in the car and the car showing no problems while i was driving it and how did they miss it when I had took the car in two weeks earlier for regular maintenance and to correct a drive belt issue due to it walking after I purchased a new drive belt and pulley.
Sonata NF (2006-10) :: 2007 - Pulsing Acceleration / Codes P2A03 And P0154
I have a new (to me) 2007 3.3 Sonata w/ 64XXX miles on it. Recently it set off codes for P2A03 and PO154 indicating a problem with the front upstream o2 sensor. Before I replace the sensor I was wondering if these codes might have any other underlying cause.
Symptoms: The car has recently had one instance of pulsing acceleration and one incident where it didn't want to turn over but after an extended start finally started; this problem has not repeated. Otherwise the car has strong acceleration smooth idle and drives fine.
Also, I would like to know if o2 sensors are covered by mandated emission warranty or by Hyundai's 10y/100,000 warranty.