Sonata NF (2006-10) :: Random Misfiring At Idle And Shaking Really Bad
Oct 14, 2014
My car has had random misfiring when at idle and has been shaking really bad but once I accelerate and get up to speed the vibrations and misfiring stop but the check engine light flashes for a few minutes. I have changed spark plugs, all 6 ignition coils the intake manifold gasket and both camshaft position sensors. My car has 180K the codes that are showing up are 300,301,303 and 0016. I really love the car and have had no prior issues the car before this ran like a champ.
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Took this car for scheduled maintenance, tuneup on 12/19. AFTER the tuneup, it started shaking when in idle or going slowly. Took it back 1/5, they confirmed it was misfiring, checked a computer code, replaced one of the coils. The misfiring went away but returned, worse than ever, last week (early Feb).
I read somewhere that replacing coils for misfiring can be just treating the symptom, not the cause. What should I do now?
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My 99 Explorer XLT V6 SOHC has been misfiring lately. In idle the RPM needle fluctuates a bit and the vehicle vibrates and shakes. At night when the lights are on I notice them dim a bit as the engine struggles in idle. It doesn't stall very often at all. Accelerating I notice way less power and the engine studders. That's when the engine light comes on flashing. Then remains on solid afterward. I brought it to a mechanic friend who read the code and it was cylinder two misfire as well as the O2 censor.
I replaced the plugs and leads and censor. Noticed the plug in cylinder two had little to no gaping. Thought I had fixed the problem. The vehicle ran perfectly. Three or four days later driving on the hwy same problem came back. Thinking it must be the coil pack I got one for a good price and replaced it. Again, the truck ran great for four days and now the problem has returned. Same thing, shaking studdering and flashing engine light. I have verified the locations of the wires and plugs a few times so i believe they are all properly installed.
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My 99 Explorer XLT V6 SOHC has been misfiring lately. In idle the RPM needle fluctuates a bit and the vehicle vibrates and shakes. At night when the lights are on I notice them dim a bit as the engine struggles in idle. It doesnt stall very often at all. Accelerating I notice way less power and the engine studders. Thats when the engine light comes on flashing. Then remains on solid afterwards.
I brought it to a mechanic friend who read the code and it was cylinder two misfire as well as O2 censor. I replaced the plugs and leads and censor. Noticed the plug in cylinder two had little to no gapping. Thought I had fixed the problem. Vehicle ran perfect. Three or four days later driving on the hwy same problem came back. Thinking it must be the coil pack I got one for a good price and replaced it.
Again, the truck ran great for four days and now the problem has returned. Same thing, shaking studdering and flashing engine light. I have verified the locations of the wires and plugs a few times so i believe they are all properly installed.
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So as I was heading out the other day, the car had low acceleration and engine shaking. The check engine light started flashing.
Checked the codes at the parts store: P0300, P0301, P0303.
I just dropped it off at the auto repair shop.
Could it be a I'm just wondering if I shouldn't have taken it to the dealer as the printout says it could be a CPU issue?
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Recently got broadsided (passenger), got the body fixed up. Now it is Misfiring on idle and only on idle...
Prior to this I had Coil go out on me, got that changed out, changed the spark plugs. It was running great then the accident happened an this Misfire on idle problem.
Took it to the shop, had them check for a code, no code. They suggested that it made be do to carbon buildup from the previous misfiring issue and suggested using STP engine treatment on it.
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It's happened twice I am sitting at a light then the ESC and ABS light pop on. When I turn off the car they go off and it hasn't happened again.
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I've bought 2006 gl sonata 2.4. Car sounds good though rattle noise comes on and go of any time. I can drive my car for an hour and never hear anything, or i can just start the engine and hear the rattle. The noise is the same all the time though it could be louder or more silent randomly. My AC doesn't work. One friend of me said it must be AC compressor that starts and stops by itself because of the some magnet in it. Could that be true or there is a different reason?
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Lately I've been noticing an Intermittent/random steering wheel whine. It happens rarely, but as of late I heard it a couple times. I checked the fluid and its topped off. Car has about 85k on it. I'm not sure when it was last replaced.
I'm thinking My next step would be changing the fluid. What is the actual procedure for doing this? Also, if I do go ahead and change the fluid and still get a whine here and there. What would be my next step?
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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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I know it is a random cylinder misfire code however I started my car in the morning and it was fine I moved it and put it back in my driveway. I started it up later and waited for it to heat up i came back outside 10 min later and my check engine light was flashing and my car was shaking like crazy you could tell the engine was misfiring like crazy. I had under a quarter of a tank but not empty yet. I shut it off and turned it back on and it was still doing it. I drove the mile to the gas station the way it was.
Under partial throttle it was revving to 4500 and over 5, had to let of throttle to make the car shift up a gear. I filled up and started the car again performed fine after that however the check engine light was solid now and still on. I went to my local mechanic and he read that code P0300. I changed my spark plugs that day and they were crap the original spark plugs I have 65,xxx on my car now. Car is smooth now. I cleared check engine when i saw him first and it did not come back on all day even before i changed the spark plugs later that night. Why my light was flashing and why my car was acting like that till i filled up?
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My 2007 3.3 Sonata has begun acting up at a cold start up. The motor shakes violently and I have to cut it off and try again. It normally smooths out. This has happened intermittently two or three times in the past three years but happened twice today.
I am out of town at the moment and my wife has the car. She is worried about driving. I am thinking it is some type of sensor etc. If I knew what it was I could have her take it in and I could monitor the repair process.
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Car has a weird shaking or vibrating coming from the middle or the rear of the car, I can't really describe it. You can only notice it at low speeds, and it's only noticeable after you drive for a while, it doesn't happen immediately. It happens whether you press on the brake or not, just while driving. I'm not sure how I should handle the situation either. I changed my rotors and brake pads because I thought that might have been the problem, but it turned out it wasn't.
I took it to the dealer, they said it was the end links that were loose so they changed that. It didn't fix the problem. I took the car back, and they checked it out, they couldn't locate the problem. They put it on the lift, said it wasn't the sway bar, suspension, etc.
They said because I didn't change the "brake pad clips"(I'm not sure what to call them), and they appear to be the original ones that came with the car, I'm not really sure if they are or not, but I know the brake pads were changed once, but maybe that wasn't changed, I need to change them first, and since they looked for a problem and don't want to waste more of their time (basically what they told me, they will start charging me to find the problem now), they will charge me $159 labor + $20 for the part + tax to change it. Now it may or may not fix the problem, that may not be the problem at all, and if it doesn't fix it then I'm out almost $200 for no reason. They said they don't want to waste time, and it's ridiculous to look for a problem with my car. But the problem is it's a vibration or a shaking, and I would think that SHOULD be covered by the warranty.
Should I try taking this to a different dealer, and pretty much never go back there again? Get the part changed myself at a different mechanic shop, as I don't see a reason to spend $179 + tax at Hyundai.
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i have a problem that has been going on for about a year now at 188000 miles i had a code po302 to fix it i had replaced the distributor, cap, plugs, wires still had the problem went to the dealer had fuel pump replaced gas tank dropped gas lines cleaned car runs a lot better but still misfires at times does not matter if hot or cold does misfire a bit more when on the highway does not matter if accelerating or coasting i now have 198000 miles on it not sure what else to try before the major tune up the engine was running perfectly
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Have an 06 F150 5.4 3v with no power. spark knock. rough idle. wants to die while driving, and random misfire code. Have replaced fuel pump, filter, coils and plugs. What to check next? Already thought of EGR - it doesn't have one.
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I have a 2007 gs 350 awd with about 98k miles. I recently started noticing this strange vibration whenever i stop at a red light. I would describe the vibration as a shiver of some type where the RPM kinda drops. After the vibration, I started noticing my car using a lot of force on the freeway and giving me very low mileage. I did some research and changed the motor mounts, and cleaned the throttle. This slightly fixed the vibration but cleaning the throttle fixed the low mileage/using extra force when driving at high speeds. but the vibration still seems to be a problem. Also, does the exhaust possibly have any role in the vibrations?
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I have Subaru B9 Tribeca 2006. Week ago started the following problems - after starting up, engine is shaking (rough idle) for a few (20-30) seconds and then it's OK. Then I got Check Engine, Cruise and ABS lights on. Diagnose shows mistake in 1st cylinder. changed spark plug, air filter, checked all connections, cleaned injector and throttle. Lights went out and engine was working as new. but the second day car had rough idle again....
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Have a 2007 Sonata (2.4 L inline 4) and been plagued with rough/shaking car when initially started and pull to stop, and generally goes away when fully warmed up. Recently had oil change and service area switched me to a lower viscosity oil (5W30 to 5W20) and checked a solenoid and it was fine. Also did a fuel service treatment I suppose in an attempt to flush out stuff........I was a little surprised he didn't pursue talking about tuning up aspects but maybe none of those codes flashed......a repeating code I do have is Code 11.........though I confess when the codes refer to emission stuff I sort of ignore them.......
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My '99 Olds Intrigue was running rough & short on power. Autozone read a trouble code "random misfiring" (PM3000 I think it was). As suggested, I changed the plugs/wires and checked resistance on all three coils with no luck. Here's the real spooky thing: while driving down the street a couple days ago, the pipe between the catalytic converter & muffler separated, scaring me and sending all the children getting off the school bus scrambling for cover. There was no noise or odor prior to the 'drop out' - is there any chance that the one problems (a catalytic malfunction, or small leak in the area for instance) could be related to the misfiring? A mechanic - before the pipe plummeted - had suggested it might be an injector problem or the intake manifold but I figured that an injector problem would trigger a code.
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I have a 2003 ford ranger edge with the 3.0l engine. It started acting up today so i brought it to get checked because the check engine light came on. Three codes where pulled p0300, p0306, and p0313. They were multiple/random cylinders misfiring, cylinder 6 misfire, and first misfire at 1000 rpm. I have replaced the plugs and coil and still have the trouble.
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I used fuel injector cleaner in two different gas tanks; the car started shaking and the check engine light came on. The mechanic changed a sensor but the car was doing the same; I was told that it will take 4 full gas tanks to clean the gas lines. I went to autozone and they told me that the car had a misfire on cylinder 5 and multiple misfire as well. I do not trust the mechanic any more since I had to take the car back to them several times and still is not fixed. They also did a full tune up and the check engine light still on and flashes when I am going about 55 mph.
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