How to Fix a Car that Idles Poorly (Rough Idle)

Does your car idle poorly, have a rough idle, or in general have an idle problem? Learn how to fix a car with high or low idle, and learn how to fix a car that idles up and down by cleaning the idle air control valve. The IAC valve is what keeps the cars idle at around 800rpms. If you turn the ac on and it idles low or your car stalls at lights or in reverse, or your car shakes at idle, this video can also help!

Throttle Body Cleaner:
Pipe Cleaners:
Socket Set:

The OG Idle Air Control Valve Cleaning video (7yrs ago):

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  • D T
    D TPrieš 14 val

    Mines rough and low when first started, to the point where if revved then let drop, it does sometimes cut out, then after a couple minutes pass, runs absolutely fine, could that still be the same issue?

  • Finboy92
    Finboy92Prieš dieną

    10:00 NICE?!

  • The Flat Rock
    The Flat RockPrieš dieną

    I have a 650 idling and it stalls at a stop when hot. I replaced the valve and problem returned. What’s wrong? It’s a 2002 Camaro with 5.7 engine

  • Kioumaars Taeed
    Kioumaars TaeedPrieš 2 dienas

    Does anyone know if this works for engines that have a too high idle too?

  • ruben aerde
    ruben aerdePrieš 3 dienas

    Love your video ,it help alot

  • Bryce’s Bikes and crazy contraptions
    Bryce’s Bikes and crazy contraptionsPrieš 3 dienas

    My k5 blazer idle goes up and down

  • TrickedHat1139
    TrickedHat1139Prieš 3 dienas

    I have been searching everywhere why my uhf stalls my car this must be why??

  • Jose Ramirez
    Jose RamirezPrieš 5 dienų

    Can it be. My throttle body on my 99 honda civic ex we just put a motor into it

  • Timbo Tim
    Timbo TimPrieš 5 dienų

    chris fix, you mad man, you did it again

  • pchouthai12
    pchouthai12Prieš 5 dienų

    Hi Chris, I think my car has some idling issue. After starting the car and driving on 2nd gear for around 50-60 mtrs, the car power goes down and it literally stops.. I need to de-press the accelerator and press it again to fix the issue.. can you please help me fix this issue? What can be the problem? My car is Fiat Punto Grande..

  • Kekflo
    KekfloPrieš 5 dienų

    Chris when will you do a meet up bro?

  • Ricardo de Lemos
    Ricardo de LemosPrieš 6 dienų

    When i start my car in the morning it starts idling low, nearly to the point of shutting the engine off, then compensates by revving on its own and it does this a few times before settling down It also has stalled when turning the steering wheel too hard when I'm trying to park I drive a '92 mercedes 190E, should I try to do something about it, is it even the IAC? (if it has one lol)

  • layne gruver
    layne gruverPrieš 7 dienų

    Is this the same with a carb engine that does not have a air intake tube

  • Jeremy1976
    Jeremy1976Prieš 7 dienų

    What about the idle air control valve would it make the needle on a dash jump up and down

  • Joe D
    Joe DPrieš 8 dienų

    Always appreciate these vids but these are not always easy to access

  • Kota Vera
    Kota VeraPrieš 9 dienų

    I’m trying to figure out what radios you use and how you put your own background on it, my guy.

  • Adan P
    Adan PPrieš 9 dienų

    I have a Honda CR-V 2012, when I drive it for the first 5 minutes the engine hesitates between 25 and 35mph, what could cause this?

  • Remo Charlie
    Remo CharliePrieš 10 dienų

    Can you do throttle change video

  • Indoorjoker
    IndoorjokerPrieš 11 dienų

    wow, I usually follow and watch some of these videos to get a general idea of what I might need to do but at 4:20 he's like "let me show you how it works so you understand why you might do it!" He then shows my exact intake manifold for my v6 T-bird. Thanks Chris ya wizard.

  • Unit X
    Unit XPrieš 11 dienų

    Chrisfix for president 2024!

  • RaveSoCal
    RaveSoCalPrieš 12 dienų

    Well my 2011 scion xb doesnt have IAC ive cleaned throttle body by wipe and spray once befoe thought it only worked for about a few weeks

  • David Allen
    David AllenPrieš 12 dienų

    How much would a guy save cleaning his old one vs buying a new one?

  • Young S.A.
    Young S.A.Prieš 12 dienų

    Can I clean do this wit mass airflow Sensor cleaner??

  • J_pear
    J_pearPrieš 13 dienų

    Could a gummed up iac stop a car from reving over rpm’s?

  • Alex Anonymous
    Alex AnonymousPrieš 13 dienų

    Hey chris, my newedge is having an accelerating issue when i drive my car accelerates on its own but not always usually when I do a pull the rpms stay high and im pressing the break and my car is still trying to go and it makes it really hard to stop and when I do get it to fully stop my rpms are high and once i let off the break my car speed up on its own up to 30mph or higher without me ever pressing the gas, I throw it in neutral to be able to stop but my rpms shoot up to 3,000 rpm and shuts off any clue what it could be? I cleaned my throttle body but still same situation I am clueless please help :/ @chrisfix

  • Victory Transparency
    Victory TransparencyPrieš 14 dienų

    I wish I could do the things Chris does but I'm handicap, I can lift the hood but that's about it

  • Robert Kattner
    Robert KattnerPrieš 14 dienų

    I don't have that problem with my Tesla.

  • U.S.A Auto truck roads services
    U.S.A Auto truck roads servicesPrieš 16 dienų

    Nice and clear explanation video

  • Matthew Richmond
    Matthew RichmondPrieš 17 dienų

    What would you say about a vehicle running rich with no explanation? Same engine as the mazda in the vid just newer. 2002 Ford Ranger 3.0L. Just trying to find other things that could cause -30 short and long trims.

  • burgandy88
    burgandy88Prieš 17 dienų

    Love the logo on the stereo!

  • Kekflo
    KekfloPrieš 17 dienų

    My car suggested me this 🥺🥺

  • Gus
    GusPrieš 17 dienų

    In a manual transmission, what causes the idle to jump up (or down) when the car is put in gear? There are no codes and it seemingly seems to bog/stutter under load.

  • That Old Oak
    That Old OakPrieš 18 dienų

    Thanks Chris, you did a very good job! I have a quick and simple question ask your help, How to make the sopy water to check exhaust system leaks? I appreciate if you tell me how to do that. Thanks,

  • Bioheart
    BioheartPrieš 19 dienų

    4:55 - 5:00 ouuu u so freaky Chris 😂😂😭😭

  • The Randomizer
    The RandomizerPrieš 19 dienų

    So what if you fix the air leak in a car and your throttle body is still acting up. This problem is on my 2013 ford fiesta.

  • The Randomizer

    The Randomizer

    Prieš 16 dienų

    @ChrisFix i have to check cuz I just replaced the intake manifold gasket and throttle body gasket and that fixed the leak. No codes related to air intake. The codes are P0336, and P061C.

  • ChrisFix


    Prieš 19 dienų

    Any check engine codes? Could be a vacuum leak. What’s your short term fuel trim?

  • Shahzaib
    ShahzaibPrieš 20 dienų

    Please try Hydrogen cleaning for carbon removal, does it work?

  • Chimera
    ChimeraPrieš 21 dieną

    I have a 2015 Dodge Caravan, and I really appreciate this video! It idols around 500 rpm and shifts weird. I'm going to do this and I have a feeling this is the issue!

  • BGKO1992
    BGKO1992Prieš 21 dieną

    Do u still have the LT1 corvette ?

  • Macaroni Slap
    Macaroni SlapPrieš 23 dienas

    not sure if this will go through, but i got a 2009 chevy malibu with a high idle, in the upper 1000s and 2000s. going to clean the IAC and throttle butterfly and see what happens.

  • Uncapabrew
    UncapabrewPrieš 23 dienas

    This sounds exactly what could be wrong on my truck! Ill check it out

  • Leo Hodapp Sr.
    Leo Hodapp Sr.Prieš 23 dienas

    Chris, I made this repair. I replaced my IAC valve. Before replacing the valve, I priced the valve. Auto Zone wanted about $50 dollars. A Ford dealer wanted about $100 dollars. I chose Auto Zone. Auto Zone's IAC valve works just fine. My car started stalling at the red light, that's no fun. The repair took about 15 minutes.

  • Jason Henderson
    Jason HendersonPrieš 23 dienas

    Man, I did not realize how much my car is actually asking for help until I saw this

  • Dann Keevers
    Dann KeeversPrieš 24 dienas

    Sooo.. what do you do when your car has a bad idle you install a brand new IAC and there's no change ??

  • Barbacena
    BarbacenaPrieš 24 dienas

    I dont know if this will get answered but will try anyway My Audi A4 1.9Tdi from 1999 is almost stalls and it even stalled once when i engage the reverse(Manual) the car idle´s fine when in neutral when runs perfectly when driving and go throw each gear (1,2 and so on) Can some tell what could it be?

  • Grant P
    Grant PPrieš 25 dienų

    ANYONE HAVE ADVICE ? I have a 4.0 litre V8, Baby Northstar Engine in my 2001 Olds Aurora, have this "intermittent problem". When it just about comes to stop it "sometimes" starts to buck a bit, does not come to a smooth stop, but usually does not stall. This happens on and off ?? Where do I start ? clean the throttle body, leaky EGR valve, fuel filter, idle air control valve, or maybe a crank sensor, unique to V8 Northstar engines. Any of you good mechanical guys that read the posts here on this great channel, please give me some advice, as I don't know where to start - thanks. Man, who wouldn't want to have Chris Fix as a neighbour :)

  • Sfiso Terrance
    Sfiso TerrancePrieš 25 dienų

    To me you the blessing

  • Frankie Reed
    Frankie ReedPrieš 25 dienų


  • Eugene Urbina
    Eugene UrbinaPrieš 26 dienų

    Chris help me to stop burning oil on my Lexus ES 300 1998

  • S F
    S FPrieš 27 dienų

    Think the engine bay is ready for one of Chris’s super cleans

  • Emman Almacen
    Emman AlmacenPrieš 27 dienų

    quick, detailed and specific. thumbsup sir

  • Avi Shalom
    Avi ShalomPrieš 28 dienų

    Help! I have a 1989 MR2. It starts fine and idling fine when cold. But idle drops below 600rpm when engine warme up. It has idling issue and misfired. Sometimes it shakes the engine.

  • Charlot Ductan
    Charlot DuctanPrieš 28 dienų

    Hey Chrisfix, I have an Impala 2011, and when engine is cold, it won't rev high (rather, it fluctuate at when it goes high and then settles nicely at low but I can't drive the car until engine is reallyhot, otherwise it won't even drive properly. I'm assuming after much thought that it could be an EGR Valve, as few test shows issues with EGR, will this method you did with IAC Valve work the same to fix it?

  • Outlaw Yeeyee
    Outlaw YeeyeePrieš 29 dienų

    Would brake clean work

  • gene
    genePrieš 29 dienų

    Why's everyone wearing latex gloves to do auto repairs these days? I hate them unless need to be sterile. Goop works great Just wondering, decent video tho.

  • Tunde Ogida
    Tunde OgidaPrieš 29 dienų

    What can I do without you.

  • Victor
    VictorPrieš mėn

    Man now this guy rocks, bla bla bla bla bla!!! But he shows you befores and afters and explains things not just bla bla bla bla bla like most LTdronrs!!!!

  • K. Backus
    K. BackusPrieš mėn

    Got my idle fluctuating on Tacoma, going to clean IAC on the morrow as we say in the King James!

  • Martin Dakurah
    Martin DakurahPrieš mėn

    where do you locate the ica in a 1995 Mercedes c180

  • hypoclit
    hypoclitPrieš mėn

    Anybody know how often a throttle body decarb/cleaning should be performed? It was done to my truck a year ago when I got it and today I took it for an oil change (at the dealer) and they recommended a throttle body decarb again after a whole year

  • Olivia_ Semande
    Olivia_ SemandePrieš mėn

    Okay so I’m assuming no one is going to see this but I’m open to any suggestions. My car has had the check engine light on for a while. It has turned on and off a couple of times, but has now consistently stayed on. I have used a ODM II reader and the code is po172 engine too rich. I think it’s my fuel injectors but it could also be my sensor. My car idles funny sometimes when I start it. It bounces from 0 to 2 rpms and gradually stops after a while of running. On very rare occasion the car just doesn’t start. I have noticed though that when it idles weird that if I put my foot on the break it kinda calms down a little. Also I have noticed that sometimes when I let it coast between 30-40 mph, the rpms bounce down just slightly and go back up every two seconds. You can actually feel the car bounce forward a little when it does this. I tried taking it to a mechanic but he said it wasn’t worth diagnosing. I need this car for probably another year or two and I can’t afford it breaking down on me. Basically what I’m asking is what should I do?(btw I drive a 2004 Pontiac Grand Am barely at 100,000 miles)

  • Synmantha Rebold
    Synmantha ReboldPrieš mėn

    Wow I really like this guy explaining things step by step really helps A LOT and knowing what he's talking about and speaking with such self-confidence it's great I love it keep it up man you do good job

  • ialwaysprocrastinate
    ialwaysprocrastinatePrieš mėn

    Thanks this might be my problem

  • Chris Webb
    Chris WebbPrieš mėn

    I love your videos man but geez do you make me realize there are more things wrong with my car than I thought 🥲

  • Allan Orozco
    Allan OrozcoPrieš mėn

    Chris, Please Help!!! My issue is that my car won't turn off. Also, the cluster lights are all on even when I plug the battery. The power locks, windows, ac and so on do not work. Once I turn the key to turn off the car, the car stays on and the cluster lights also stay on. The only way to turn off the car is to remove the Main relay and remove the ground battery or else it will drain it. I can't find anybody to help me. I've replaced the ignition coil and it didn't help. I don't know what else to do. I'm hoping is the BCM .

  • Candice Diqe
    Candice DiqePrieš mėn

    Spent the day cleaning out the idle regulator along with putting on a new heavy duty serpentine belt and completely retooled the battery compartment with brand new terminals and wiring harness, now the truck runs like a freaking clock thanks Chris.

  • CJ Pilla
    CJ PillaPrieš mėn

    Amazing exhaust on the stang

  • krikor1000
    krikor1000Prieš mėn

    Very easy way too hard with that one person who can make it work better

  • Joshua Lott
    Joshua LottPrieš mėn

    My 2001 Civic has a rough idle but only sometimes, usually after it has been driven about 40 or 50 miles. I have recently replaced the spark plugs, ignition coils, AC compressor, AC condenser, AC drier switch, AC expansion valve, and alternator. I have also cleaned the IAC valve. My engine air filter is clean. What else are likely culprits for causing a rough idle?

  • MannyZ


    Prieš mėn

    I assume that there could either be a vacuum leak somewhere or your intake valves may need cleaning. There are cleaning solutions for the intake valves that you can find in most auto parts stores.

  • Jaime Guzman
    Jaime GuzmanPrieš mėn

    You saved many people a lot of suffering and frustration! Thanks

    GOIN CRAZYPrieš mėn

    Hey Chris, new sub here. Just wanted to say now I know why you're top dog. Your details, enthusiasm, and positive attitude I believe is why. Not sure how I've never saw you until now but thanks for what you do and how you do it.

  • Ali Shehab
    Ali ShehabPrieš mėn

    Awesome video Chris! Love all your content. I’m thinking of getting a Ford Ranger soon and was wondering what headunit you have in the truck?

  • Lowrenzo Si
    Lowrenzo SiPrieš mėn

    What if you remove the sensor an the idle is steady but not a 800. Do I still clean it out the throttle body or is the sensor the problem

  • Charles Downs
    Charles DownsPrieš mėn

    car looks nasty.

  • Charles Downs
    Charles DownsPrieš mėn

    if poor u can't get a fix. lol

  • Mohammed Rahees
    Mohammed RaheesPrieš mėn

    What a difference of 8 years ! Just wow

  • Hiro Miya
    Hiro MiyaPrieš mėn

    Chris, my car idles really rough, but there’s one problem, my car is not equipped with a idle air control valve. Help is much appreciated.

  • Mary Davis
    Mary DavisPrieš mėn

    My truck has low idle I start it and turn the wheel it almost dies You can't reverse at all maybe 2 or 3 feet and it dies imma Give this a shot

  • LineX Iversen
    LineX IversenPrieš mėn

    Can you use brake cleaner for this application?

  • 1uciano
    1ucianoPrieš mėn

    Thanks ChrisFix, not only I was about to detach my whole air system, but to learn my car has an electronic sensor which just needs to reprogram!

  • Jessie James
    Jessie JamesPrieš mėn

    Where do you get those gloves ?

  • Jerry Ray
    Jerry RayPrieš mėn

    Can this cause an engine to stall? I have a 94 Dakota and it keeps stalling as soon as I touch the gas pedal

  • Eli Fire
    Eli FirePrieš mėn

    Hmmm isn't that an EGR valve?

  • Owsow Muskwa Naistus
    Owsow Muskwa NaistusPrieš mėn

    Your cars are running pristine because of these videos you made for us

  • Jay Ti
    Jay TiPrieš mėn

    Thank you so much. I'mma do this.

  • Patrick Alexander
    Patrick AlexanderPrieš mėn

    🤔I cry foul!!! Chris, you don't drive the Mustang.😂😂😂😂

  • Carlita Miller
    Carlita MillerPrieš mėn

    Awesome video. I feel super confident that I can fix my high idling on my Chevy Traverse. Prat for me 🙏🏽

  • dɘath_writtɘn
    dɘath_writtɘnPrieš mėn

    he revved the engine in the first place not to see if it would idle lower just to flex his exhaust and intake noise lol

  • Gregory Kusiak
    Gregory KusiakPrieš mėn

    Idle problems on cars with an electronic throttle body can occur with a carboned-up EGR valve- same principle. I had a pickup like that one- there was a recalibration procedure for the IAC, just like a re-learn for an electronic throttle.

  • raylyd
    raylydPrieš mėn

    my mitsubishi had idle probleams going a bit high even though it warmed up so i will try this :)

  • Moratz
    MoratzPrieš mėn

    Why am i watching this video? Im driving an electric car. Pfaahaha. Maybee you never know what comes next

  • Arron Hollaway
    Arron HollawayPrieš mėn

    Hey man could this also be the problem if it only low idles on start up? My lancer on start up only wants to sit around 500 and the AC wants to drop to lower and has made it die from the AC being on too, but once it’s all warmed up and I have driven a bit it seems to be ok. I’m curious of I should pop this off or sense it’s only on start ups if it could be something else

  • Arron Hollaway

    Arron Hollaway

    Prieš mėn

    Also would like to add I have a p0401 and a p0506 code triggering too.

  • The Rental Man Buch
    The Rental Man BuchPrieš mėn

    Just as he started the Mazda I got the AutoZone ad where the guys battery was dead so it just went click click click come on 😂😂

  • ChrisFix


    Prieš mėn


  • Recep Göçen
    Recep GöçenPrieš mėn

    My uncles lada samara drives on 2k rpm

  • The Flat Rock
    The Flat RockPrieš mėn

    Should bring these cars into a garage and get an estimate to show how much you save repairing it yourself

  • The Flat Rock
    The Flat RockPrieš mėn

    My 02 Camaro only stalls when hot and at a stop such as waiting in a drive through. Throttle body is clean. I found the large clamp for the air intake hose to the throttle body was loose but should not cause the problem? I’ll clean the icv since it’s never been done

  • Ru production
    Ru productionPrieš mėn

    Is this necessary for EFI engine

    TONY ARRIAGAPrieš mėn

    Hello chris I'm looking to buy a used car what do i need to check before buying a used car Thank you

  • Phil G
    Phil GPrieš mėn

    What is a drip sting

  • Bobby Dade
    Bobby DadePrieš mėn

    Trying to get an” iac valve gasket”? is non existent for some reason at auto parts stores I’ve been to and called .I’m now hesitant to do this .

  • allamerican limousine
    allamerican limousinePrieš mėn

    Try to found idle control valve in 2015 GMC Yukon XL 5.3L can’t found it can you show me please thanks