Fun fact about post '97 XJs: You can check the codes without a reader. Hold down the trip reset button while turning the ignition to 'on' until the odometer starts cycling through numbers. Then release the button. The odometer will then display the code.

ONe of the best videos on car repair that I have ever seen. Audio is right on and the video is clear and focused ( except for one closeup). Kudos to you and your video!

Great video! Details were clear and to money! The electrical chk up really helped with understanding that power is/not getting to the valve. Thanks a Bunch, You Roc Dude!

Bro this was a life saver. Video descriptions were perfect as I do not know a lot of car jargon but you were very easy to follow

Thanks for sharing and being informative without dragging it out for 30 minutes before you get to the good stuff

Finally after 1& 1/2 hrs a video that shows most of the important tests on the iac sensor Even Scotty Kilmer just swapped it out no test at all. Thnk u.

Really detailed vid, appreciate you doing this. Learnt a lot. Thank you.

Hey thanks for the video my 98 ZJ 4.0 did the same thing and that was the problem so got the new IAC and it runs great. THANKS

Funny. I used to watch you and your little buddy when I first got my miata- and now I've just recently bought an XJ.

Really Really Good Tutorial. Extra points for the veedub!

I had pulled and cleaned the IAC on my '01 XJ due to low idle and stalling at stops. The low idle and stall disappeared but was replaced by a hanging idle when the accelerator was pressed. Finding your video was a godsend, especially when you read the installation instructions that came with your IAC replacement referencing that the engine will hang high idle until driven 5 miles at 45mph to reset the "brain". Thank You!!! We're good to go......

14:27 the way he looked into camera when he said "let me clean that passageway out" lol

Nice man. I'm about to drive here from ID to OR to check out a 93. My daily is a 79 f150 300 4x4, so this amc thing is new to me. Luckily, the one I'm going to check out has 10K on a new motor. We'll see tomrw. Thanks for the vids.

Thanks for the vid! I just got a 2001 XJ and have been playing around with fixing some issues myself. Your vids are definitely helpful and encouraging (I know little about fixing vehicles).

Great video learn alot about my Jeep Cherokee.

@ around 17 mins, "hopefully that way will be easier, uh, not being easier" , that's the club we all are in lol great work guy, lots of thinking happening there

I just recently changed the idle air controller on my 2003 Ford Expedition with the 4.6L V8. I tried to clean the valve and didn't get any change, so I replaced it. The 4.6 repair of the IAC was made as easy as can be because the IAC actually sits on the idle air circuit, rather than bolted to the side of the idle air circuit. Disadvantage is that OEM price for the part is around $90.

After selling my preface lift XJ and have been actively looking for another one. These vids remind me to keep searching for one

Detail in explaining specifics is what I appriciate

😮😮😮 A GearHeads video!!!

They're back!

Great video!!

Great video

Great information, thank you

Nice presentation thank you.

Seriously, it makes it so much easier to diagnose a problem

Just replaced mine on 2001 Cherokee. Same problem and it too was stuck in the extended position. Jeep is running good for the moment and check engine light is off. Good video!

Great video, thanks. One question though, on the video the right side of the harness was 12 v , the 2 inner connectors switch, does the left outside show anything at all?

Thanks for the well thought through and presented video. You've delivered the best information on the subject I have found. I'm Working with. a '96 XJ (2.5 four banger) that Ive had for over 15 years, and just failed smog.. (California.....Love it or hate it, or wish you were somehow smog exempt...) I Got a code for O2 sensors and idle control. Replaced O2 Sensors, and Idle control and threw a tune up at it. (Quality cap, rotor, plugs, and wires which is something I consider annual maintenance.) Also decided to throw a new blue streak coil at it as I could not name the year I did that last. Surprise! Old coil was cracked straight through, It's a wonder it ran. Runs better, it runs smooth, But Stil... I'm Getting a check engine light and code for idle control? I bought the Standard brand metal Idle control, wishing to spend a few bucks more and not have to re-consider new part function after installation and subsequent possible failure. Idle at start up is about 1200, and very slowly settles down to maybe 900-1000. I'm a fan of slow idle, would love to get it down to 600-700, and thinking that may be the level that enables the check engine light to go out and Pass Smog. (Insert celebratory fireworks here). I did see another youtube that instructed adjusting the length or the idle control valve plunger prior to install. ( and there was much criticism of that in the comments) That is a straight forward process, the plunger does screw in or out for adjustment, and the other video suggested Matching the adjusted length to that of the old valve plunger, thereby arriving at the correct length adjustment. Your new Idle control valve self adjusting after a few miles of driving was news to me.... but your Cherokee was 97 or newer and mine is not.... My new valve had no such set of instructions. Any Suggestions? Thanks again.....

This is gold for a guy on a scale of 1-10 im a 5 in just man shit. volt meters scopes and car and computer stuff car stuff. We alike think differntly ! thanks.. !

I use a BlueDriver OBDII dongle that uses bluetooth connection. Can run diagnostics when it is running, and on the Ford, can reset the codes while engine is running. I have used it several times to fix a few issues.

My folks own a 1996 jeep cherokee sport 2 door rear wheel drive high out put 4.0 . Originally a conservation jeep. It was made late in the year so it's also and 97ish model as well . It uses a 97 and on up TPS not a 96 TP S ? Factory wiring no splices. Started having problems cutting out once in a while or reving high and with the check engine light would come on some times . Replaced the TPS fixed it for a while and back to square one off and on same problems? I came across your video will definitely check/replace the idle control module.

Hello, just found this video, and it is very good and informative. I do have a question to ask. I have a 2000 TJ w/ a 2.5 has a high idle.

Video very helpful

Helpful 💯💯

great stuff tks

Good video

Good job

hey what does check emmissioins light mean? been like that since i bought it.

Any reason why I would only have roughly 5volts on the wiring harness that plugs into the IAC?

Missed Clock Springs issues (older mileage vehicles). Front Audio Speakers, Door Lock and Window Wires between door and body. Leaking oil filter adapter. Broken front seat console (made of plastic and if you lean on it the support will break and most Jeep XJ are broken in 97 and up) . This guy is only getting started. Should of made a list before he even got started making the video. Don't get me wrong, he came up with some great issues. I loved my Jeep XJ that I have owned (1995, 1997, 1998, 2 x 2000), but I love my Forest Green 2001 the best. Changed the interior from tan to black (sweet). Never took any oy my jeep to a mechanic. I have done all my own work. The biggest issue with my Jeep has been other driver not able to see them and hit me. Insurance companies are quick to total out.

I also noticed the IAC plunger on the new duralast does not move when I try to move it.

i bought a new iac valve, but doesnt work. i think there is no signal recived in to the iac. so how can i trace the right signl to the iac?

Could my sputter and hesitation occurring in the lower gears (AT), with P0170 code that says lean but runs rich in open loop be the IAC? 2000 XJ 4.0. No vacuum leaks. Fuel pressure feels good. No test on fuel pressure. Will replace filter. Engine only hesitates and bucks upon acceleration. Code is only Pending in closed loop. Last 15 miles gives no CEL. Running better as time goes by, but still getting that initial sputter, intermittently, seconds after accelerating has begun. Great Vids, Keep em coming. Broken thumb has me JeepTubing😁

I was given my mom's 96 Grand Cherokee Laredo it doesn't have a check engine light but I noticed like a surge, like it wants to stall maybe distributor cap any help thanks

Awesome! Let it be known that I will giggle like a little girl whenever I get notified that you have a Miata update video out. Take care.

I'm having a low idle issue...when I unplug the IAC it doesn't do anything different to my idle speed, which is around 600 rpm, it's very low and almost dies if I don't lightly touch the throttle. the throttle body is clean and sensors are new. Glad you talked about the 2 circuits, inner and outer. I'll test those again with my multi-meter and some paperclips and see what voltage I get on them. 1999 jeep cherokee classic xj

En pocas palabras limpiar o cambiar la válvula iac

Hmm. Didnt mention where or how to check spec on resistance for the IAC. I'll have to do some searches myself then :/ My Haynes manual doesn't give me the info for it. 10:12 is what it is for this range of engines

Would love to know where you got one for about 12 bucks. All my local parts chains want $59.99-$64.99 with AutoZone, Advance and O Reilly on the low end, Napa and Federated on the high end.

My jeep idles at 600 and when it hits 500 or less it shuts its self off. You think that sencer could be causing that.

Hi I have a 97 Zj no power at the IAC

My jeep cherokee sport 1999 the idle is one line onther 1000 thats normal.but the motor not working right

Woo hoo!

Spec resistance for Idle Air Control Valve is 50-60 ohms --> 9:00

You can clean the old IAC with spray cleaner then work the pintle back in by holding it in 1 hand & using your thumb to push the pintle back in by rocking it back & forth. If it's stuck you won't be able to do this obviously. Also oil that O-ring before reinstalling new IAC. Could have also been a VAC. LEAK, I've seen that on the 4.0's.

What is the name of the part? This is exactly what is wrong with mine.

What is the vacuum lines that run into the brake booster is that part of the brake system that would make my brakes hard to push and harder to stop

if that part is bad will it also cause the engine to rev up and then slow down rev up and slow down repeatedly? it does it in park or neutral

While driving, I've seen my idle drop, then it kicks back up, then drops again at random times, could it be the iac? Sometimes when I start the engine the idle jumps high then drops back down while in idle and warms up. I took it trailing and worked all morning perfectly, came home, then when out for dinner and while driving on the fwy, it was driving fine then the idle started droping and jumping back up. Any ideas?

What part did you replace it with I would like to know the name brand. I bought one from Oreillys and it came defective.

Some old jeeps you turn the key to on 3 times and then you can read the codes off the dash then google the codes and it will tell you what the problems with your engine is so when you go to the shop your mechanic can't sick you around✌️

Sorry about that, I didn’t get to complete my question. It idles at 3k , cleaned the throttle body and IAC valve and passage way. Reinstalled and Jeep idled down to 1000-1100 rpm. Next am started Jeep idled at 3k again checked codes got the P0505 code so went and bought a new IAC and a map sensor since they are right beside each other. Now idles at 2000 checked for vacuum leaks have not found any as of yet. Have not checked power or resistance will do that next any other suggestions would be much appreciated. Thanks

replaced TPS and AIC valve, cleaned throttle body. 1994 jeep cherokee country running like new again. i 'upgraded' to a more reliable name for both sensors (standard motor products). in the past i usually would go for the cheapest product, but after much neglect i figured she need a little extra TLC. from my experience, the instructions that came with the AIC say you can 'adjust' the head manually before install. it was somewhat vague as to why, but i say absolutely NOT. do not twist clockwise or other. you are only asking for trouble.

I have a 2004 Jeep Grand Cherokee got the code p0505 and changed the IAC but now my idle sits around 1000-1200 rpms when In park but I put it in gear and it drops to about 600 and I still have the code any help?

Just replaced spark plugs, cleaned throttle body and IAC and new vacuum elbow. Now Jeep stalls and hard starts. Now getting P1296 code on dash. Suggestions? Thanks. ✌ Doe's it matter which way the IAC goes back in after cleaned or and new??

I cleaned my throttle body replaced both tps and iac and now have a high idle AND stalling issue,,, any ideas?

Does the fuel pump and idle control senser have same symptoms when going bad

My scanner must not be very nice.. 🤣I can’t see if it’s working via scan tool.🥺

Hey great video! Couple of questions for ya. Where did you order your iac valve from and how has it held up over time?

My 1988 idles real and shakes put a new iac valve but nothing still runs rough any answer please help

I changed that and still get a code 1294

ONE THING that pops up, neutral safety switch. LOL bypass it if your reverse lights dont light up and your car will not start. Its 300 bucks or so to replace. Paper clip works just fine to bypass under the hood. Just be safe because it will start in neutral. I only start mine in park unless working on it anyway.

Damm commersials

Tuned up in a recent video lol your last video was 5 months ago so hardly a recent thing

You guys need to start it up so that people can see what it sounds like to see if their problem is this same problem

get an arduino and stepper driver

Don't but cheap parts thats why people have to keep replacing things Ithats why I only get genuine parts

you broke it

Mmmm, swapped ecm and all seems normal. Go figure,,,,,

Great video but this guy talks very loud

Great video