I have a 2007 3.3L Sonata.
The car has been sitting for around 8 hours. Wh en I start it, the idle moves up and down about 100rmps. When I drive off there is a slight hesitation until I have driven for about 10-15 minutes. The idle is nice and steady after the too.
If I use a fuel system cleaner, it appears the car is fine for awhile and then the issue comes back.
I hear a squeaking noise when I start my car. It is mostly in the mornings. Sometimes other parts of the day also. I believe it is on cold start because I usually hear it when the car has been sitting for a few hours.
My first thought was that it may be the belt so I popped the hood and looked at it. The belt seemed nice and tight and there were no cracks or extensive wear on it.
Second thought was brakes. My front brake pads are good but rear brake pads are close to needing replacement. Sometimes when I brake I hear the squeaking noise but it is hard to tell because at time it feels like it is coming from other cars.
Could the brakes be the cause of this sound? Even though it is at start up and not constant.
Car is 2007 Sonata with 100k+ miles on it.
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 RepliesI have a 1997 Explorer Sport 4.0 SOHC, 110,000 miles. When I start it in the morning or after sitting for a few hours, the idle is very rough. Most of the time it wont even stay running. My first thought was a vacuum leak. I found four leaks and repaired them, including the EGR valve control and the EGR solenoid. One stem on each was broken off. I bought these parts from the dealer and then tested the vacuum, which I now have vacuum pressure. The check engine light is on and doesnt read the "system evap emission control pressure sensor low" (vacuum leak) anymore, but it now reads "system too lean (bank 1) and system too lean (bank 2). I cleaned the IAC valve and have ran several bottles of injector cleaner through. My mechanic thinks it is the IAC, but when you disconnect the plug on it, the car will barely idle, so it must be working at least a little. I have seen suggestions for a fuel filter, which I am going to replace, but I am really lost here.
View 14 RepliesSo 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?
View 3 RepliesRelative owns a 2007 Sonata 3.3L V6 (58k or so), purchased from in-laws so no warranty, unfortunately. Recently, in cold weather the car has developed hesitation issues upon start up, ESC-Off light illuminates and CEL. Has to restart for somewhat normal operation.
Had a chance to look at it today and CEL had already turned off and only code stored is P2135.
Researching issue (mostly here, so thx!), looks like TPS is faulty and can be replaced separate from throttle body to save $.
I purchased a 2007 Sonata with the 3.3L about six months ago. I really like the car, it has a lot of good features and lots of power; however, I am starting to have problems with the car. On accelerating from a stopped position the car almost quits (hesitates severely) and then picks up and goes on normally. Also, between 40 and 50 mph the car starts to jerk pretty hard for a few seconds and then it straightens out and runs normally again; it will do this repeatedly if it is kept between 40 and 50 mph.
When this first started happening the CEL would come on randomly and stay on for a day or two and then go off. While the CEL was on I took it to Autozone and had them pull the code, they said it was the crankshaft position sensor. Well based on the symptoms the diagnosis made sense. I replaced the sensor and the car seemed to be running normally on the 30 minute test drive. The next day my wife drove to work and she said the same symptoms had come back. It has been several weeks since I replaced the sensor and the CEL has not come back on. I have seen several postings about the spark plugs and wires and that is my next step. BTW the car has 94k miles.
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?
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
I've got a troublesome misfire in a 2007 Sonata V6, 70k miles, which I have been trying and failing to track down for a long time.
More than a year ago, the owner of the car complained of rough idle. When this was first mentioned, I looked at the car, she and I talked, and I concluded that she hadn't changed the oil in some 20k miles. ...... Nothing else seemed wrong. I changed the oil, thinking that what she needed was an oil change.
Some time later, I was in the car myself and all of a sudden felt a strong bucking. Must've been a misfire. I recommended taking it to the Hyundai dealer, thinking the so-called 100k mile powertrain warranty would cover whatever it was (it didn't but whatever).
We drove it to the dealer. The dealer firstly informed us that the CEL had burned out, so we had missed some codes. The dealer further us the car needed new plugs and replacement of both upstream O2 sensors. Here was what the mechanic wrote:
"BETWEEN 35-40 PUT CRUISE ON AND WILL FEEL. CHECK AND ADVISE COMES AND GOES. MULTIPLE CODES STORED IN SYSTEM. ... P0300 RANDOM MISFIRE (ACTIVE), P0140 O2 SENSOR CIRCUIT NO ACTIVITY, P0154 O2 BS S1 NO ACTIVITY. WATCHED O2 VALUES AND FOUND ERRATIC READINGS. FOUND TSB 10-FL-012 SUGGESTING REPLACEMENT OF BOTH UPSTREAM O2 SENSORS. RECOMMEND COMPLETE SYSTEM TUNE UP FOR RANDOM MISFIRE. HOWEVER MISFIRE COULD BE RELATED TO O2 ACTIVITY.
So the owner went to a different mechanic and had the plugs, upstream O2 sensors, and one of the downstream sensors replaced. All OEM, I believe. ($$$!) (O2 sensor parts 39210-3C100, -3C200, and -3C400) Dunno why the downstream one was replaced, not my doing.
Following this, there was no real improvement. No codes either. The problem comes and goes, so maybe I thought it was fixed, but it has come back. Sometimes, it can be felt just slightly when the car starts cold. Other times, it can be felt just barely when driving at a consistent speed. Sometimes, the problem becomes really bad and jerks the car around. Other times, nothing.
What to check next? Coil packs? Intake manifold gasket? She never gets "top tier gasoline," but I would be skeptical that that's the problem. These are the top three suggestions I've heard.
So my sonata 2.4L has been freaking me out lately. Once it has been driven and warmed up good, it starts to idle rough at rest at lights and in traffic. Now the crazy thing is it idles even more rough if I switch it into neutral during those stops. One more thing is it idles the worst after I fill up with gas and get stopped at lights.
So what I have done:
Cleaned the MAF sensor with MAF spray
Changed spark plugs (I4 so it comes with coils not plugs)
Put Lucas Gas treatment in
So I'm getting no check engine light. So all I can think of is fuel filter. Or some other sensor. I mean I know it could be a coil so that would be the next thing I check. What this could be?
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 RepliesI have a 2002 celica after sitting for a hour or so car has very long crank....
View 1 RepliesI have a small problem with the 337. this morning it was -21 and i started the car and it died right away second try it died right a way third try it started no problem. after work it was around -2 and same problem. i have problem starting the car when its been siting for a few hour.
What could cause this? i changed the crank sensor last weekend. put a brand new battery. cause the last one was 7 years old.
Car is hard to start when sitting about 9 hours or longer to a day without being started up it is hard to crank over, I am at a loss to what is causing it, the car has a new battery, new distributor rotor w/wires and cap, my car is an 1993 Nissan stanza ALTIMA GXE w/automatic seat-belts, the car is fully loaded Except for sun roof or heated seats, I do have 242360+ miles on the car. I kept the car well maintained from Nissan, and they can't find anything wrong with it. is this the case of just old age on the cars behalf? what I do notice is there's a slight drop in voltage reading on battery the night before to the next day, can a starter be my problem??
View 12 Replies101,400 miles on car. Started noticing about 2 weeks ago, at idle, and as pickup up speed, a whining noise coming from the engine bay. It has gotten a little worse, so I started trouble shooting.
Basically, at idle, its somewhat annoying, but as you hit 20-30mph it can be more annoying if the radio is off or at low level. If Im sitting there in park, and its whining away, all it takes is me cutting the A/C knob to OFF, and then quiet as a mouse.
So, other than the compressor going bad, I can't see anything else related? I always hate when AC problems show up, they are never cheap....
My 1995 Buick Lesabre will intermittently drain the battery after sitting for about 12 hours. It is unpredictable. The battery was newly installed in December, 2010 and the alternator was tested at that time and about three weeks ago and proved to be recharging properly. This battery kill happens even when there is no visible sign of current usage, such as a dome light being left on. What I should look for in order to to find the source of the current drain?
View 2 RepliesI had left my car for about 30 hours without driving, which I've done before all winter with no issues. Went to start it up yesterday morning to head out and when the key FOB failed to open the door, I knew I was in trouble.
I unlocked the door manually, and put the key in to start it up and the Treg was completely dead and the key wouldn't release from the ignition. After a call to VW roadside assistance, and a jump start, it started right up and I dropped it off at the dealer for them to look at.
The service report says "diag and found low state of charge. charged battery and found passes tests. performed TSB 27-05-01 and cleaned ground point for battery. rechecked OK"
This is a V6 Touareg (there is a similar TSB I understand for V8s).
I have a 2005 Passat Wagon, V6, 2.8L. I purchased this car used about a year and a half ago with 10,000 mi. It now has 32,000. I have done all scheduled maintenance. About 8 mo ago I started noticing a problem when starting the car. It seems to take a while for it to "turn-over" while starting it up. We've taken it to two different VW dealerships to try and solve the problem. About 4 mo ago, one of the dealerships replaced the ignition coil. They were able to read a memory chip of some sort to identify the problem I was having. Since this repair however, the problem has begun again. There is no consistency. Hot or cold temp. After sitting several hours or only a few minutes. The problem happens about one out of every five starts.
View 7 RepliesMy Corolla sometimes cranks longer than it should when starting. This happens if the car has been sitting for a few hours. Although it doesn't always happen.
It happens when the tank is full and empty. The weather has ranged from 100 down to 60 degrees. The car has 20k miles on it and has had regular dealer servicing. What's going on with it? Otherwise it runs fine
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From the first day i bought this car i had a strange noise coming under the hood. Every time i leave my car for at least 2 hours parked and then started, when i do a few meters i hear a noise like a hydraulic valve comes in place and my brake pedal does a small movement. After that everything is normal.
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