F150 Idle Air Control Valve Symptoms and Replacement How To

[@AnthonyCruzTechnoJedi]

Dude truck died this morning wouldn't start, rolled down to Oriely's and picked up a IAC, five minute swap scrapped off the old stuff and popped in the new unit, and BAM!! we got action! my 2002 HD supercharged F150 back on the road! Thanks for your quick and no BS video...Keep up the good work!!

[@KeithBeTatted]

Anthony Cruz this is what’s happening to my dads truck. If by any chance has it ever died and turn on every so often and then turn off down the road again on its own? If so I might go buy a new IAC and try it for my self.

[@riverrivers250]

@@KeithBeTatted my truck is stalling too when i have it in drive. And stop the rpm’s will drop so low and the lights will dim. And it will die at times. But it will start back up…. Im almost thinking the ICAV… or the alternator idk

[@CarlosGonzalez-Ziya]

Did your truck stall often before you replaced it? My truck has started stalking at red lights or if I stop to go in reverse

[@riverrivers250]

@@CarlosGonzalez-Ziya for me my problem was the throttle body… it was black on the inside soo i cleaned it up.. its all good now,,, for my truck anyways

[@riverrivers250]

Behind the plate

[@flukedogwalker3016]

Great, thanks for mentioning the hoses that can split.

[@JCWren]

That initial high idle when you first started the engine after changing the IAC is caused by the needle being in an unknown position. The IACs come from the manufacturer with the needle wide open. The ECU then runs the needle to the position to hit the target idle speed. It's not a relearn, so much as an initial positioning.

[@angeloarmebianchi7015]

So, Is It normal the High revs at the cold start?, because im having that situation.

[@stillblastin96]

@@angeloarmebianchi7015 did you figure this out im having the same issue lol

[@angeloarmebianchi7015]

@@stillblastin96 mine goes over 2500 rpm Just once, After that goes down to 1500 untill drops down to around 900

[@stillblastin96]

@@angeloarmebianchi7015 i just fixed mine it wast he iac valve i replaced it and its back to normal.

[@benschwab3592]

You: yeah this ones mostly coming off clean Truck: what did you say?

[@skoodlemoose]

been trying to find a good video for this and i have to say i love how straight to the point and easy to follow your video was, good job and again thank you

[@dntlss]

Whats incredible about this video is that you were able to replicate every single symptom, almost on cue,lol,that never happens when you are trying to show someone whats wrong specially a paid mechanic. I have the same symptoms on my car but a new idle control motor didn't help it,reason i believe is my ECM is 30 years old and capacitors and processors start to go out and no matter what you do its not gonna fix the problem until the ECM gets overhauled.

[@LehewTech]

Yes I've seen a similar issue with the Ford "personality modules"

[@charlies6546]

u need new TPS not IAC u need a trick to remove stuck bolts...

[@edlopez5k]

Thanks a ton for this video. You answered all my current and future questions while showing us what we needed, how easy it is to perform the repair, associated troubleshooting, and using one hand. Subscribed!

[@PoliceforChrist]

Did it all with one hand! Impressive! Good video thank you.

[@maximinnn]

DUDE. your delivery in this video is perfect, felt like I learned some major pointers. We seem to have the same issues although I have a 1990 Ford E-250.

[@Manguz24]

Totally appreciate the time and effort you took for this video showing how to troubleshoot and replace the idle air control valve. By the way if I was to replace all three pcv elbows are they all the same size/fit?Thank you so much and great job.

[@johney4484]

My ‘97 F150 has never been changed. My issue is when the outside temperature gets hi, it won’t idle. Thanks for the video. Looks simple enough. Got my new valve from NAPA.

[@gummyfy4418]

Got the same truck, how much was the valve at Napa?

[@tonyabowman1719]

I want to say thank you so much for your video. I can barely check fluids and add them...lol. I had a 'friend' who kept saying he'd check my 2001 expedition. Almost a month lost to waiting. Finally got the part myself and change the Idle control valve MYSELF!! Only issues I had was the stupid bolts...lol. and the plug in was on bottom on new one, instead of side like old one. Thank you for helping this girlie girl show she can do anything 😎😎😎

[@ninamarie2312]

while in park or at light engine RPMs lower just a bit then goes back to normal then it does it again various times so this iac seems like it's the first step that's cheap and easy so why not do it first in going to attempt to do it on my own.

[@tunefully1792]

My 2002 F150 Lightning had a surging issue more than a dying issue. It also kept wanting to bring its own idle up in park, and while coming to a stop. Definitely driveable, but needs fixing. I'm also having to do a relearn. Basically let it idle in park then turn ac on let it idle then press parking brake all the way and put it in drive and let it idle then go drive for 30 minutes as you normally drive even if its aggressive (fast) driving.

[@michelmedina8250]

Is it normal to have the gap on the bottom hole of the iac feeding into the top hole?

[@elirobertson2324]

Hi there, I'm hoping you give a reply to this! Id love a little advice. I'm getting to feel a little hopeless here haha. I live in the wilderness and my money is very limited so I gotta be careful with what I buy. I've had all the same symptoms including a truck that won't start sometimes. I replaced an EGR tube that had a crack, a bunch of vacuum lines that needed replacing, spark plugs, coil packs, fuel pump, fuel filter and oil change. I kept replacing possible things as my problems would seemingly go away then come back, leaving me stranded in town. I've been good for months. Then my battery died when I left my door open. Happened so many times during the truck repair episode too. Soon before it died, it was driving fine but I got the same exact error code. P0171 bank 2 too lean Sometimes in the past it would have bank one and two too lean. P0171 and P0174. Well I replaced my battery. The error code is now gone. Drove 100 miles and then this morning my truck is revving weird after starting. No code on code reader yet but boggin down then revving up. Not too dramatic but very noticable. Then I drove home and truck is staying steady now in rpm on the rpm gauge. I can however feel a slight chop or chug sometimes while idling. I'm 25 miles away from town, so I can't chance breaking down along the way. Someone can bring me a part though. Should I get the idle air control valve haha?? What do you think about this?

[@GSGSongs]

I have the same problem gonna change it out, I'll let you know of the outcome thnx for the video

[@igotchuroadrescue7274]

My explorer is doing it right now as I'm watching this lol

[@flowersfam3462]

Glad I found your video because I am going to do my Motorcraft Idle Air Control Valve when it comes in from Rockauto. Have you had to replace the Throttle Position Sensor on your truck and if so do you have a video?

[@ambrosiotorres3387]

Thanks for this video .I had same problem change the idle control valve and problem was resolve .

[@kingloco3610]

Hey man I changed all coil packs and plugs and now my truck shuts off when I come to a stop have u ever had this problem?

[@mohammedal-hawaj9105]

I HAVE THIS ERROR code p1504 ford expedition 1997? its idling low when its cold only! do you recommend that i replace IAC valve?

[@chuckychuck]

I don't care what anyone say these IAC throws a p0174 and a p0171 code, I unplug this IAC while my engine is running the car stalls right out, I reconnect the wires and start the engine the car cough like crazy before and catches itself b4 it stall out, the the engine is starving for fuel but this IAC is letting into much air. My car goes into limp mode when starting off the computer trying to make up the lack of fuel under a load so tranny kick into limp mode because of the lack of vacuum and my engine revs up to kick it into 2nd gear, I really misses the 2 and 4 barrels holly carbs these emission controls are junk, you running around like crazy to figure out the issue.

[@ggggffc]

Mines is having this same problem going replace it this week $38 at my local parts store

[@efrensaclolo7021]

Mine is not idling and fluctuates up and down, I replaced with standard brand in December and runs fine until today it is fluctuating again, since I have a warranty on it the seller is willing to give me a refund just return the item, I'm in the process and shopping for another brand like Hitachi IAC for $43 like $10 cheaper than Standard brand.OEM is $60 so Might consider the one that will last.

[@slyvesterchillis9557]

Man! You took out all the huffing & puffing.. & you delivered those instructions real GOOD! Thanks!

[@inthegarage342]

This is on the back of the throttle body on 2002 2v 5.4.

[@JonahNAloha]

What about when you shift into reverse and truck wants to die out?

[@JonahNAloha]

It was low transmission oil, now the burnouts begin.

[@KINGRG1]

My transmission blew 2 weeks ago and as I was pulling off the road the truck started idling high. I installed a Motorcraft IAC 2 years ago. My battery light came on and my battery was drained… It’s a cluster of a situation that I’m trying to figure out!

[@bradh6185]

Is that tray above your radio big enough to keep your phone there?

[@j.j.oliveira7278]

Hello, I just replaced my IAC valve on my 2003 f150 5.4. Seems like it’s revving quite high now tho. At stops I’ll be right around 1000rpm and can feel the truck wanting to pull. Do you know what could be causing this problem? Thanks!

[@efrensaclolo7021]

Could be a defective one.If it is a Standard after market one try to get theOEM motor craft that will solve it.

[@j.j.oliveira7278]

Efren Saclolo sounds good! Thank you!

[@j.j.oliveira7278]

Efren Saclolo update: truck is working perfect after replacing with the new IAC. Also cleaned the area better with throttle body cleaner and showed to be quite dirty inside the hole where the valve goes. Thanks for your help!

[@Big_John_C]

Unplug it and see if it idles down

[@thebull5099]

I have a problem. Every winter, cold days. My 2002 ford f150 4.6, will crank fine, run great, but on those cold days if I get in and drive off. It will run fine, then surge. It want take the gas. It stalls and surge. I've replaced, IAC, all that stuff under the hood. And even fuel pump. Still does same thing , in cold weather or cold mornings. If I let it warm up, it will not surge or stalls. It runs fine. No problems in the summer or warm to hot days

[@michaeldavis8187]

Great video man

[@jerryneal8400]

Mine seems to act up after highway driving. When the engine is cold, it starts and runs fine. After highway driving, it revs to 2500 when I put it in park. ??? IAC ???

[@LehewTech]

Most likely your IAC is failing. During highway driving, the engine is under load and the vacuum generated can overwhelm a weakend spring inside of the IAC, causing very high idle. The truck might otherwise act normal

[@adrianmettz7463]

@@LehewTech exactly my symptoms too...only when it's warm and I have to really hit the brakes now and again, then "kerchunk"...normal idle...thanks man...

[@lerg12]

My 1996 F150 with a 302 seems to be doing that, I installed a new MAF and it idles a lot smoother I noticed but sometimes it still starts shaking a little bit, but not constantly like it was before the MAF change. I also have been doing the drive into neutral test while driving and sometimes it revs up high then comes down, sometimes it just goes right back down. I noticed when I put the truck in park after driving up the highway for 40 mins to help my friend move a table, the truck idled at 1000 RPMs and kept fluctuating back and forth between 1000 and 900 until I shut it off, waited a few mins then turned it back on to move the truck and it was completely fine. I bought the new IAC just to be on standby because I’m still not completely sure if it’s that, I don’t have the CEL DTC code popping up for it either, I guess only when it’s on it’s last leg is when it throws the code is my assumption but I’m definitely gonna be fixing to change it ASAP to see if that makes a difference.

[@DavidRios-fc5nr]

Hey man, When I try to turn the truck on it cranks forever before it turns on. I cleaned this part out and it started working for a while but then started doing the same thing. You think this is the issue and if so should I just buy a new part?

[@reneramirez8922]

I have a 2001 ford f150 5.4 supercrew, have issues on cold start rpms drop then goes back up just that 1 time cold start. Cleaned the throttle body with new gasket issue went away. After a few months same thing happened then cleaned the iac valve also went away after that. Couple weeks it started to do it again any help on what could it be thank you

[@Shtluck6699]

Thanks for the vid

[@efraintolentino3949]

Good videos, thank you for sharing.

[@butchpemberton6143]

Hi, i like your videos and i too have a 2002 f 150 4.6 it has just developed a intermittent high pitched sound that only lasts until engine warms possibly you might help with that.

[@ninjahunter4784]

I have a 2012 fx4 5.0 coyote engine, the idle has been dipping to 450rpm to 500rpm not up and down just steady, I recently had my water pump replaced, and when it idled before it was around 650 to 700rpms, now it idles at 450 500rpms, and low oil pressure light comes on ? If I hold the peddle to keep it at 700rpms no low oil pressure warnings??? Any help

[@neomatrixfree3627]

This is superb!

[@d.k.2272]

I have a 2001 4.2. I changed this part and it seemed ok when I started it up. Took it for a short drive and the idle issue is back. It’s manual transmission. In neutral or in gear while at a stop it idles up and down over and over like it might die. Changed the plugs and ran sea foam in the tank. New battery. Replaced air flow sensor. What could this be? Please help.

[@LehewTech]

You could have a vacuum leak allowing unmetered air into the intake manifold. A common culprit is the pcv hoses.

[@fredylopez7623]

I have a 2000 Ford Expedition and when ever I stop the car the car wants to turn off and I just replace the fuel separator that goes next to it so I'm thinking do I need to replace this part to " the IAc valve

[@j.p.2109]

My 2000 Ford F 150 is going through the same thing. Was it the IAC Valve? Could you plz help bro. Thanks!🙏

[@bjg770]

I have a 94 f150 302, my truck is a 4 speed with od. She would surge when accelerating hard, especially going uphill.The guy at the auto store told me to remove the IAC and clean it. It did good for about a week and started again. Tried cleaning it again but the same. The truck hasn’t ran for 8 months before I got it. Do you think I need a new IAC? Or maybe it’s something else? Overall, the truck runs great. Any ideas?! Thanks

[@LehewTech]

I would go ahead and replace it. Also check for vacuum leaks, the PCV lines are a common culprit

[@bjg770]

Lehew Tech Thank you, I’ll check that out as well.

[@snowman374th]

mine is a 90 5.8 apparently it's illegal on youtube cause I can't find one to see anything that matches my own. But I've replaced just about everything but this and map sensor. And I get a backfire after it's gets running temp. And or hotter.. I need it fixed. 3rd gear and up is put put put put POW!!!!!!

[@gustavoleonaguilar]

And don’t forget the fuel consumption going up so high as well !!

[@PURPLEGANGOUTDOOR]

I think mine is a 4.2L V6 and looks like your set up is it a 4.2L them same way to get off becuz I've seen others trucks were they had to go to the back the only difference is my iacv is facing alittle dif then yours any help is appreciated 🤔

[@Big_John_C]

Same

[@mikelarry5230]

i have the same truck and color i replaced the iav and it still idles bad and engine light is on

[@jozegotcl0ut167]

Can a bad tps also cause this problem ?

[@LehewTech]

Generally a bad tps will trigger a check engine light.

[@caldel733]

Thanks man

[@charlies6546]

sounds like u got a bad TPS, highway symptoms is not idle data

[@robertdewitt7543]

Is this the 4.6 or 5.4?

[@LehewTech]

4.6

[@hm6846]

@@LehewTech mine is a 351 Windsor 5.8

[@boobizzy4173]

One hand😂😂😂😂 you would be a great drummer 🤣🤣🤣🤣👍👍

[@LazzarrusLong]

Is that a Def Leppard reference? 😁🥁

[@scottykilmer3920]

No need to relearn! hahahaha!!!! And he says it like he's is absolutely sure about it! hahahahah!!! 🤣🤣🤣🤣

[@gregpalafos9431]

Is this a v6

[@Big_John_C]

No, that's a 4.6 v8 but the 4.2 is the same setup

[@PaulRevere130am]

Did anyone else notice that he didn’t plug it in?

[@LehewTech]

I plug it in at 5:00

[@wesleywhittington8499]

Not until he pluged it in

[@adeptheatingair]

You sure it was the IAC? they really don't fail.

[@LehewTech]

IACs fail all the time. It was definitely the IAC in my case.

[@Super3Percenter]

lol wish my f250's 5.4 IAC was that easy to change! Not

[@adrianolavarria]

Very common problem on this ford... won't hurts nothing

[@LehewTech]

It can damage your transmission from idling too high when you are in drive at a stop.

[@Heyheyrayeraye]

I swear it's like you MADE this video for me! My Expedition is doing this same thing, and you have actually given me the confidence to attempt the repair myself! I am a barely-can-pump-gas woman, by the way!! 😂

[@bridgewhacker1989]

Was having the exact same problem with my 2000 f150. You're fixed solved the problem amazing! I feel like I'm driving a brand new pickup thanks for sharing the info

[@HeartlessHopelessRecords]

It hurt me when u put it on park. I was like about to punch Back ir something haha

[@eddiemurray2789]

thank you

[@ragnarthefearless9235]

Thank the car gods for youtube mechanics. It's saved me 1000's of dollars in mechanic fees over the years. I hate spending money when I don't have to. 20or30 dollar parts would cost you 100-200 dollars for a mechanic to install then of course you have the dishonest ones that try to con you into replacing things that dont need replacing. I used to work at an auto parts store and deliver to all the local mechanics and I know first hand how shady they can be.

[@motorradingaround1220]

Man you are so lucky our that easy to get too. On my 5.4 excursion it’s on back side of engine by firewall in the hardest place to get to

[@mikeharmon8733]

My older F150 would do that same thing. I found that idle air controller valve would got sticky. To fix it, I took the plastic manifold part off intake to the throttle body and sprayed throttle body cleaner into it hole before the throttle plate. The engine lugged and after the idle stabilized, I'd repeat the cycle a few more times and it fixed the problem. I do not know why it would get sticky but the problem was solved.

[@michaelspradley814]

I changed the iac and still does he same thing. Do you know what else may be causing this? 99 F150 4.2 L

[@MrSavDoe]

@@michaelspradley814 mines too on my 96 mercury grand marquis 😡

[@TheTruthBeToId]

My 2000 ford lightning was idling when I floored it a bit and then the truck started to idle like shit and shut off and didn't want to start. It blew my maf fuse (because the wires are a bit exposed) added the fuse back on and kept idling like shit but it got me home and now I need to know if this shit is the problem.

[@zacb7427]

Changed mine out and it works better with it unplugged.

[@angelf9800]

Did you fix the issue, I had the same problem I had to replace my idle control valve and throttlebody and seemed to help it. Runs great now

[@TexasGreed]

People like you are so cool for helping people like me out.

[@deephorizen9230]

Great video ! I’m going to clean mine now.

[@mark98070]

Did your truck also have the rpm fluctuating up and down slightly like it was hunting for the correct idle speed? Thanks great video

[@LehewTech]

Yes that was an early warning sign. A vacuum leak (most likely in the pcv hose) can also cause that

[@JesseEdwards-l4p]

I got a 95 Ford XL and it ribbs low and then has to catch up it don't bother me only does it sometimes wen I crank it I think a lot of the Ford's are bad about it

[@fernandorivas1573]

Hey buddy I need help so I got an 03 ford f150 5.4 so when on idle and it's in park i can feel that slight tremble rpm stick doesn't move a whole lot so is this the idle air control valve?

[@richardspringman857]

I have the same thing happening. My mechanic did find the vacuum hoses for the dpfe sensor were leaking and replaced them. This helped slightly but didn't resolve the issue. His scan tool also showed some occasional misfires. He moved coils (coil over plug) around but the misfires didn't follow the coils. Did you ever get your issue resolved because I haven't yet. My problem just started.

[@juniorr2808]

@@richardspringman857 did you find the issue?

[@hdsluggo182]

​@juniorr2808 my misfires were due to a leaking head gasket, ended up getting the engine rebuilt.

[@salvador8735]

Man, thank you

[@mitchtucker5768]

Is yours a 5.4. My iac on my 2001 f150 is on the left side behind the throttle body. I wish it was as easy to get to as yours!

[@LehewTech]

4.6L

[@glorygiftsglory2771]

i changed my iac valve but it still idles high at a stop

[@angelf9800]

Did you fix your problem I had the same issue and and had to replace my throttle body as well.

[@hotrodderrecycler3202]

Mine lasted 23 years. That is if FixD diagnosed it correctly. And if my eBay purchased one for $30.76 last as long. Fuel Pump I replace from eBay stock lasted 2 years. Amazing thing with his history they had a used one on eBay for more then new ones.

[@boobizzy4173]

Thanks Mr Le🙏🙏🙏🙏 happy holidays to you and your family

[@LehewTech]

Thank you sir! You as well.

[@hm6846]

I have a 1989 e250 and changed mine. I replaced mine. Then It ran good for a few days. Then started that wanting to stall intermitinly again. Could it be a hose? Got mine at discount auto too. Thanks

[@LehewTech]

It may be best to install a motorcraft part as some of the aftermarket valves have a high failure rate

[@hm6846]

@@LehewTech thanks. Am I on a time limit before I break down?

[@efrensaclolo7021]

Just get the OEM Motor craft,After market parts have a failure rate after two weeks of use and fail back to the same problem.

[@JesseEdwards-l4p]

Make sure the PCV valve is tite and rubber washer it goes to fits tite it mite help it did my Ford

[@joelpaige7222]

Yep, 2000 F150, 4.2 290k miles. Change mine at least once a year 🤷🏽‍♂️....it always happens

[@biggesu2tfan2005]

Fellows?

[@christitschinger2072]

Ok I have a manual and everyone I down shift it seems like it’s Erving up waaaay higher than normal and it’s also doing that weird idle up and down thing you showed when you first started

[@overflowenterprises]

DURHAM NORTH CAROLINA HUH? I've been having a very similar problem with my f250

[@jessedover6175]

Gasket still stuck all over it. Thats why its going to fail again.

[@LehewTech]

This one lasted just over a year. I put a Motorcraft IACV in and it's been fine ever since.

[@Grannyhauenstein]

You are lucky your IAC is so easy to get at on your'02. Not so on a 2001 F150. Pain in the ass to get to on mine!

[@alvkvy]

What do I do if there’s no spring in mine?

[@alvkvy]

Replaced it, not misfiring as bad as it was. My old gasket surprisingly came off in one piece.

[@angelgarcias7328]

Got my car son time no want to stared need to way liltle be and stared ogain rpm go up slow thing that problem thank you video

[@vernon8337]

Yeah !! Don't know why they don't make those IAC units better ! I go threw one at-least once a year

[@choadcityusa]

My iac is behind the throttle body, in the back for some reason. Wish it was easier to change out

[@bellawright4265]

My iac has been on my 2000 5.4 for 22 yrs and 320,000 miles...no problems.

[@fashoyeah5826]

I have a k&n intake installed but I keep hearing a loud humming noise what can it be ?

[@reneramirez8922]

I didn't replaced the iac valve ,only cleaned it and put the same back on.

[@angelf9800]

Question Did replacing idle control valve fix the issue.

[@LehewTech]

It did temporarily. When this part failed (again) I went with a Motorcraft replacement and the truck has been fine ever since

[@angelf9800]

@@LehewTech same here I only get oem parts by now on.

[@Jamesdade]

question could a bad iac valve cause engine power loss when the ac is on ????

[@LehewTech]

If the engine idle drops excessively when the AC kicks on it could be an issue with the IACV.

[@Jamesdade]

@@LehewTech the idle isnt dropping. the problem is that it feels like it loses 50 horsepower and accelerates alot slower than normal and then the transmission starts shifting bad. hard delayed shifts. at idle it stays around 800rpm. once i turn the ac off the trucks power goes back to normal and the trans goes back to shifting normally.

[@TonyYesi]

Changing one on a Excursion is a pain in the ass.

[@Gruss1973]

thanks for the vid, Helped me fix my 1996 F150

[@Fordgroup00]

Thanks for the video!👍

[@chrisalertaalpha4291]

No check engine codes?

[@LehewTech]

No codes!

[@chrisalertaalpha4291]

I got a P1504 on my 99 Expedition 5.4L. "Manufacture control" was what my scanner read. Surely enough it was the IACV. Put a new one in and problem fixed.

[@zerotestltd]

A big help! Thank you.

[@reneramirez8922]

No check engine light no codes

[@rogercollins8875]

Did it whistle also?