Sonata NF (2006-10) :: Idling And Power Loss - RPMs Will Drop Below 500 And Then Spike Back Up

So over the last few months I have been having more and more idling and power loss issues with my 2006 V6. When idling she intermittently will try to stall and the rpms will drop below 500 and then spike back up. A large percentage of the time I hear a loud whining sound while driving down the road and I notice that turning off the air conditioner will remove the sound at times.

***what I have done so far**

Idler Pulley
Belt tensioner
sepentine belt
cleaned MAF
Cleaned Throttle body
Throttle Position Sensor
Had car reprogrammed

So I pulled the belt off and checked all the pulleys and did notice some grittiness in the AC pulley (inner) and was wondering if this might be the issue. Attached is a video I uploaded, Video .....

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Cavalier :: RPMs Will Fluctuate Between About 625 - 675 When Idling Rough

i got a problem with my 96' 2.4 auto cavalier. It idles really rough at idle. I've replaced alternator, battery, idle air control valve, intake, plugs, and the fuel pump in the last year and a half. I've noticed that the rpms will fluctuate between about 625-675 when it's idling rough. About once every 11 seconds the car will rev up for a moment and will idle smooth but then it idle rough again. Every one in a while it will throw trouble code p0200 random multiple cylinder misfire.

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Mini - Cooper :: RPMs Spike Rapidly From 3K To 4K

In the past month or so I've noticed some weird behavior out of my car. 2006 Mini Cooper 130K miles on it (still going strong!!) Automatic.

Scenario 1 - Driving in D accelerating at a normal pace (read, not gunning it) the RPM's spike rapidly from 3K to 4K and the car almost sounds like it's redlining. Once it hits 59-60 MPH it drops back down to 3K RPM and the rest of the acceleration is normal.

Scenario 2 - Cruising on the highway at about 70+. Normally start taking the foot off the gas to slow down with traffic and when my speed drops to about 60 MPH the RPMs spike again from around 3K to about 4K. When the car gets below 60 MPH the RPMs drop again. If i let the car come to a stop the RPMs decrease normally without any other spikes.

Scenario 3 - Driving in sport mode (yeah buddy) around 20-30MPH it almost feels like the car is not upshifting and the rpms go crazy. jump from 2500 to about 4-4500 and finally the car lurks forward.

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Ford Ranger / B-Series :: 2004 - Hard Starting / Rough Idling / No RPMs

backed out of the garage fine later in the day went to put it away started hard would not idle and only rev to 2500 .cleaned map sensor,egg valve tested and it works.cleaned the IAC and that works ,fuel pressure is 58psi. starts hard it would idle now it doesn't dies, no code . with 58psi could the pump still be bad? it has 18 pounds of vacuum. where is the vacuum line for the fuel pressure regulator on the motor?

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Celica :: 95 - Engine Is Idling At 700 RPMs With AC On

I have a 95 Celica ST (so it has the 1.8 7A-FE engine). When the AC is turned on and you rev the engine, when the rpms come back down it almost dies.

So say the engine is idling at 700 rpms with the AC on and I rev it up to 2,000 or something. When the rpms drop back down, instead of stopping at like 700 they go all the way down to like 400 or less and it almost stalls out. After a few seconds it comes back up to 700.

What does that sound like? All the vacuum lines are brand new, the throttle body/intake and egr valve were all completely cleaned of any carbon buildup.

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Camry :: 2003 XLE - Engine Vibration While Idling And At All RPMs

I own a 2.4L Automatic 2003 Camry XLE.

I've gone to multiple mechanics and none have been able to give me a clear answer. Long story short, I've just recently had a new engine put in.

While it runs fine, there is a tremendous amount of vibration coming off the engine. You can feel it while it's idling, and at all RPMs. It kinda bearable at 1,500 and is the worst at 1,800 RPMs. Beyond 1,800 RPMs, it doesn't get worse, its kinda tapers off just a little.

Notes:
- We've checked the balance shafts and they are aligned correctly.
- No engine code
- Replaced spark plugs

The vibration is bad enough that some screws inside the car have even become loosened. As I said in the beginning, I've gone to multiple mechanics and no luck. What it could be and what to do/try.

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Tiguan :: Engine Noise Between 2000 And 2500 RPMs When Accelerate

When I accelerate (particularly during heavy throttle) I hear a sound that sounds like a diesel engine between 2000 and 2500 rpm's. It almost sounds raspy in nature.

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Tiguan :: Buzzing / Howling Noise Occurs At The Engine Mid Range RPMs

I have this noise, and it has become very annoying as it occurs at the engine midrange rpms.

It is buzzing/howling noise that comes on above 2500-3000rpm, whether it is in gear/underload or in neutral/park. It is noticed most while in sport as it holds lower gears longer.

Electric aux water pump was replaced not so long ago. Have read about the wastegate rattle issue, but im not sure.

Took it to the dealer about two weeks ago for this and the tech said he could not even hear it on the test drive.

Here are some links of the said noise

Links: [URL] .....

2011 2.0TSI Tiptronic 4motion 170ps 55000km

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Civic - Honda :: Engine Keeps Quitting When Either Stopped At A Stop Light Idling Or RPMs Really Low

I am desperately seeking info about my 1998 Honda Civic. My engine keeps quitting on me when I am either stopped at a stop light idling or the rpm's are really low. This seems to happen at random with no warning or check engine light. I keep my tank more than half full with gas so I don't believe this could be it. I have been to my mechanic and they said it could be a multitude of things wrong with it so it doesn't make sense to put money into the car if it won't necessarily fix it. I am desperate to figure something out so it can get fixed because I have to drive to work everyday and I'm sick of feeling anxious while driving all the time!

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Passat (B6) :: 3.6L Engine Is Idling A Bit Rough

Just noticed the other day the Passat was idling significantly rougher than usual, most of the time it's smooth as butter but not so much lately. It's not rough like a bad misfire, just not very smooth anymore. This could be indicative of the dreaded oil-pump bolt failure rearing it's ugly head (finally)?

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Golf/GTI VI :: Engine Idling Very Rough With EPC Light On

I was just at work tonight and went out and started my car for it to warm up (it is -20) and go back inside for about 15 mins, I come out and as I am walking back to my car. I notice tons of exhaust is blowing out from the bank puffing like a steam engine and idling insanely rough with the RPM gauge at about 900 RPM with a EPC code. I immediately shut off the car. Cautiously turn the car back on. Car is idling normally, EPC code is gone, rev it a bit. Everything seems fine.

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Passat (B6) :: 2008 - Engine Has Been Idling Rough And The CEL Came On

I have an 08 Passat 2.0T with 44k on it, just did the 40k service around 42k. This past Friday I filled up from almost completely empty, and later that day and ever since the engine has been idling rough and the CEL came on. Gas cap has been checked already.

Should I wait to go to the Stealership until I've burned this tank of gas out? Is there anything else I can do that you can think of?

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Tiguan :: 2012 - Engine Is Loud And Rough Sounding

Ok, I am new to the Tiguan but not new to VW engines. For the last 11 years I am driving a 1.8T and I test drove the newer GTIs and Audis with the 2.0T. But with my 2012 Tiguan S manual I find the engine to be a little loud and rough sounding. Especially under heavy load it more reminds me of a diesel than a 4 banger turbo. Now, is this this normal or is it just my engine?

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Tiguan :: Idle A Little Rough - Check Engine Light On

New 2012 Tiguan S with a manual, 800 miles and the check engine light comes. Seems to idle a little rough, at least the idle seems to fluctuate a bit. The real disappointing part is I took it in to the dealer expecting an easy fix within an hour, its now been at the dealer for 2.5 days and they'll have it over the weekend as well. They tried putting several parts in it, still didn't fix it. They called VW who said pull out the new parts, put back the old parts, and apply some software update. Dealer did that, still not fixed.

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Camry :: Rough Idling Engine On 2002 Toyota SE

Our '02 Toyota Camry with 92,000 miles has been idling rough for awhile. I tried cleaning the throttle body which actually seemed like it made it worse for awhile. I do need to replace the valve cover gasket and I don't think the spark plugs have ever been replaced. Is that a good place to start?

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Prius (2004-09) :: Engine Will Not Stop Idling And Idles Rough

Just picked up my 2004 Prius from the Toyota dealer body shop. The driver's side was scraped by someone who wanted to be in my lane. Fortunately, we were only going 35 mph. The rear door skin had to be replaced, and most of the side had to be prepped and painted. There are a few silly mistakes: they forgot to replace the driver's door plug, forgot to replace a lower clip, and smudged a tiny area new paint on the bumper. I brought that to their attention and they are going to take care of it... they have to order the plug and clip.

However, as soon as that conversation was complete, it was time for them to close shop. I sat in my Prius, started it, and the check engine light was on. Wasn't on when I dropped it off for the repairs. Also, on the way home, I noticed the engine wasn't turning off when I came to a complete stop (even though the animation says it was off). At idle, the engine is also rough. Looked at the charge bars, and well, there were only two bars showing.

I thought perhaps, though it's not done this before without the animation screen showing it, the engine was on merely to recharge the traction battery. On the way home, the traction battery returned to full charge (green), but the engine still was not turning off when the vehicle was at a complete stop... not was it turning off when coasting... and when arriving home, even with the car in park... and still idling rough. All the while, the animation on the screen is indicating the engine should be off.

When I replaced the traction battery three years ago, I also replaced the 12v with an yellow top Optima. I wouldn't think the Optima is already going bad. I also do not believe in coincidence. I wonder if perhaps some bad fumes have tainted the MAF, or who knows.

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Passat (B6) :: Check Engine Light / Rough Idling When Stopped

Weird problem on my Passat today. First the engine light came on...followed by rough idling. It smooths out when moving, but rough again when stopped. Noticed that turning ON the AC makes it a little smoother...but when you turn off the AC, resumes the rough idle.

Already made an appt with the dealer tomorrow...but wanted to see if this problem is familiar to other owners. Either way, I will update once the dealer finishes diagnosing the problem.

The car has been perfect up to 30k miles...now 2 problems in the last month.

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Ford - Thunderbird :: 1991 - Intermittent Spike In RPM With A Lurch In The Engine

I get an intermittent spike in RPM with a lurch in the engine when I'm holding anywhere from 1500-1700 RPM. I say it's intermittent because it might happen three or four times over the span of a few seconds, and then nothing for a minute or two. I don't think it's the transmission because it doesn't happen during shifting, and I can duplicate the problem in D, N, and P. What could be causing the problem?

1991 Ford Thunderbird SC, 3.8L 6 cyl with supercharger, 4 speed automatic transmission172,000 miles

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Mazda :: Check Engine Light Blinking And Idling Rough Almost Cutting Out

Today I went to the gas station and after I gased up and turned the car on my car started idling rough, almost to the point of cutting out. I started out on the road and my check engine light started blinking. After some time it stopped and just stayed on. The whole front end shakes pretty bad when at idle. The car has trouble accelerating till roughly 35-40 mph then seems to ride ok. I'm not very car knowledgeable, but I do take care of my car. I know I need to replace some of my hoses and spark plugs soon, but am worried that it may be more serious.

What I would like to know is: 1. What could possibly cause these issues and 2.

2003 Mazda Protege

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