How To Replace IAC and TPS Jeep Wrangler

[@craigb9119]

Great vid - replacing the IAC made a world of difference. Found it was easier to remove the whole air intake than try and reach that bolt that holds it on.

[@danielm593]

Managed to replace it in my 99 Wrangler TJ without removing the intake tube. Great vid, easy to see and understand. Thanks also for mentioning the Torx size… Probably saved me a good 20 minutes of trial and error to figure that out 🤙

[@EmbarkWithMark]

Awesome to hear you found the video helpful!!! Yea, Jeep and their Torx bolts lol.

[@brycemaggio6144]

Good lighting, well edited, listed parts source. I got no complaints man, thank you 👍

[@EmbarkWithMark]

Thank you!

[@parkerparker9092]

Thank you for the info. I am going to replace my TPS tomorrow. Should be easy, thanks to your video.

[@EmbarkWithMark]

Your welcome! Glad the video was helpful.

[@Skuhunter-sx8vz]

Thankz alot man! Ive been putting off selling my 2004 jeep wrangler due ro the same issue, but now its running great!

[@EmbarkWithMark]

Welcome!

[@PNWJEEPER01]

I think it's pretty important these days to specify that you want a Mopar factory part if you go to a parts store. I asked for OEM once at the parts store in the past and was sold a part that was an off brand called "O.E.M." (Original Engine Management) which was a useless piece of expensive plastic. I didn't realize until post-install that my "O.E.M." part was not OEM; replacing with a Mopar part cured the problem.

[@EmbarkWithMark]

I have totally been in that position before. It’s very frustrating! Thank you for sharing your experience!

[@topclips1872]

Good luck with all the discontinued parts. Want a Mopar Radiator you are spending $600-$800 if you can find one working order. Other parts are also discontinued

[@PNWJEEPER01]

@@topclips1872 what we're talking about here is specifically fuel/air management sensors. They're all available in Mopar when it comes to the 4.0 and it's often the difference between an engine that doesn't run and one that does.

[@topclips1872]

@@PNWJEEPER01 I was just saying going Mopar isn't always possible because they keep discontinuing shit. I wasn't making a statement on these exact parts

[@topclips1872]

@@PNWJEEPER01 guarantee they discontinue this part soon though to try and force you to buy a newer, more electric vehicle

[@nomanmcshmoo8640]

Thank you for this video. You made the job much easier for me. I found it easier to initially find the IAC flange bolt by looking from the opposite side of the engine bay (past the fuel rail)and then get the T20 in there ( had my tools ready to roll ). I think total work time involved (including disassembly and assembly of everything ) was maybe 25 minutes???

[@EmbarkWithMark]

Glad it helped! Thank you!

[@PoppaBeansManny]

Thanks for the video I have to this to my 01 tj

[@EmbarkWithMark]

Your welcome!

[@rebeldogx420x]

Good vid. Ima get some parts after work and give it a shot! I'll let u know how it goes

[@EmbarkWithMark]

Let me know how it goes!

[@yalpnoitats7283]

whats your personal opinion on the parts from NAPA? I needed my vehicle fixed quickly so I didnt wanna wait for any parts from online to be shipped. But will the NAPA parts not last as long? Thanks for sharing this

[@EmbarkWithMark]

I think NAPA is better than most. Yea, that is why most, including myself, go to an auto parts store is because we need the parts now and can't wait for parts to ship. I have had better luck with NAPA, but I do not think the parts will last as long as the factory and the quality isn't as good. When it comes to sensors I have never had good luck with anything but factory. So I tend to stay with factory parts regardless of the vehicle, if I can.

[@hhyperdd]

Great video, man. Thank you!

[@EmbarkWithMark]

Glad you found it helpful!

[@JeepTJWheelin]

The tps and map sensor were easy, that IAC is a pita! I have an '05 TJ Rocky Mtn and the fuel rail is in the way where my socket adapter is at it's fattest part. I have to remove the throttle body assembly to get at that torx screw. That's a good thing though, I should clean the entire assembly anyway.

[@EmbarkWithMark]

Yea, the IAC can be a pain. If you have correct tool combination you can get in there to remove it. But it takes some finesse for sure!

[@JeepTJWheelin]

@@EmbarkWithMark I just removed the throttle body assembly and now cleaning it and will replace the IAC with the Mopar one I got last week. All in all, it's a very easy job. It was running and idling better over the weekend after replacing just the map sensor. So it should be even better after this. Fyi, the best way to remove the carbon in the throttle body assembly is to use a long flat head screw driver and place a shop rag or layer up a paper towel over the tip and just lightly scrub off the carbon. It looks almost new afterwards.

[@cornershottt5257]

Thank you for this video. If my idle is rough & my RPM’s kick up out of nowhere when in park. Are theses the two TPS & IAC parts I would have to replace? I have a 99 Tj

[@EmbarkWithMark]

Its very possible. I would clean them first and see if anything changes before buying parts.

[@seanmcgurk3620]

I replaced my TPS sensor in my TJ. Now the check engine light is on. Do I need to do something to reset it?

[@andrewschmidt4879]

I ordered the part from your link however I went to plug it in and the plug does not line up with this piece. Did you have to replace your plug?

[@EmbarkWithMark]

I did not replace my plug. The part I received was a factory Mopar part. Is the one you received a Mopar part? What year is your jeep?

[@andrewschmidt4879]

It’s a 2001 wrangler. It did not come in Mopar packaging and doesn’t have a Mopar logo on it.

[@andrewschmidt4879]

Actually it is Mopar packaging but it looks like a cheap sensor and the part for the connection is not the correct one for the connector

[@EmbarkWithMark]

​@@andrewschmidt4879 2001 to 2004 use this part #4874373AB for the IAC and this #4874371AC for the throttle position sensor. The parts I listed in the description are for a 2005-2006. I can give you amazon links, but I am reluctant since I have not purchased those specific parts myself. I recommend looking at Mopar Parts Giant. www.moparpartsgiant.com

[@andrewschmidt4879]

Thank you Mark! And that’s for the quick reply as well

[@hikerJohn]

I keep watching videos where no one shows a closeup of how to unplug the TP sensor. All people do is say "push the tab" but mine slides in and out and I dont know what position it should be in but I cannot get the darn thing un-plugged no matter what I do and I don't what to break it. After watching you take out the other sensor I see yours is missing the red tab but it's still plugged in so just how did you do it??? EDIT: I got it out by pressing down on the white part UNDER the red tab. Broke a few fingernails but no blood haha. It's frigg'n easy once you know how but you can't know your doing it wrong until you know how to do it right by luck or someone telling you. I had no symptoms other than an error code and poor gas mileage so at least I was not in a hurry. I cleared the code and it came back two days later. $140.00 at Chrysler because I heard the cheep ones might only last a few days to a few weeks.

[@EmbarkWithMark]

Those plugs are the hardest thing known to man to remove. Glad you finally got yours off. i struggle with these all the time. The red tab is a safety tab, mine does not have it because I broke it when pulling it apart at some point. They get very brittle. I could order a few, and probably should to replace them, but I have not. You did the right thing by buying OEM parts. Hopefully your issue has been solved!

[@CaliO.D.S.1775]

Where both of those sensors bad or did u replace just for maintenance?

[@EmbarkWithMark]

The TPS was showing signs of going out. I replaced the IAC as apart of maintenance.

[@CaliO.D.S.1775]

Oh ok, I just bought a 2001 tj with 73000 miles on it and was wondering if I should change those out.

[@EmbarkWithMark]

Cali ODS 1775 Nice purchase. If the Jeep seems to be running correctly and throttle response appears normal. Than I would not replace them. I had a small low idle issue that I was trying to find.

[@scottshure3389]

@@EmbarkWithMark Maintenance? Neither item is a maintenance item. I must say, in 20 years of working on fuel injection, I have never found both bad on the same vehicle. I recently worked in an 89 Cherokee that did have a bad idle air valve. TPS was fine, looked original and tested fine. There is no need to do this unless there is actually a runability issue. And if there were one, I’d look for vacuum, ground or wiring issues before condemning a module.

[@curtisalm]

I have a 2001 Jeep TJ that has a sticky idle. It will stay reving when I let off the clutch. Sometime the idle will even rev higher when I push the clutch in. Does this sound like it’s a problem with the TPS or IAS?

[@EmbarkWithMark]

That sounds like the TPS to me. However, I would try to clean both the TPS and the IAS before buying any parts.

[@curtisalm]

@@EmbarkWithMark thanks man, I’ll update you after I do some cleaning.

[@EmbarkWithMark]

Please do!

[@redsredneckadventures6584]

Was that what the problem was I replaced my tps sensor and it quit the high sticky idle after shifts but now hits dead skips and will drop idle so fast it almost dies

[@AdamPlayzz]

Hello my name is Adam wilson. I have a throttle position sensor that’s going off on my 2001 Jeep and I purchased the same mopar part you got and my connector doesn’t snap on. My shop back home in ga says it should snap on the connector. Is this true?

[@AdamPlayzz]

I have a 2001 Jeep tj also

[@nikeswimming7109]

Those part number work for all TJs? I have a 99

[@EmbarkWithMark]

The two part numbers I have for a 1999 are: 4874373 - Idle control valve and 68433984AA- Throttle position sensor.

[@beboboymann3823]

If the idle smooths out with the TPS unplugged why not just drive it unplugged?

[@EmbarkWithMark]

Without the TPS plugged in, the PCM uses an open loop limp strategy that severely limits any acceleration and relies on MAP and your o2's to run, reduces spark advance, and will behave pretty bad.

[@BerniesBastelBude]

since couple of months, engine (2.5L) is stubborn like a donkey when cold; replaced coolant sensor what improved say by 50%; could IAC be the issue?

[@EmbarkWithMark]

IAC could be the issue. I’d do a cleaning on it first and see if that fixed the problem. Normally issues with an IAC clear up after cleaning.

[@BerniesBastelBude]

@@EmbarkWithMark Hi Mark, I replaced the upstream O2 sensor (it had one of 4 wires cut) what solved the issue!

[@EmbarkWithMark]

@@BerniesBastelBude Awesome! Glad to hear you figured your issue out!

[@jamesrobert649]

I changed my tps on my 97 and it hasn't changed anything even though that was the code for the check engine light still bucks and jerks and a rough idle

[@EmbarkWithMark]

hmm, have you tried cleaning the IAC and the ports in the throttle body?

[@serf3469]

when I start my jeep the idle goes high and fluctuates, once I put it in drive and go it seems to stop, but everyday the first time I start it, I feel like I am in a space shuttle

[@EmbarkWithMark]

How high? It's kind of normal for a TJ, when the engine is cold, for it to idle a bit high and come down after a minute or so.

[@ATLparanormalOG]

White drop spots all over the place. Looks like a Zerex G05 leak at some time in the past.

[@EmbarkWithMark]

Very good eye! I had a radiator come apart while on Mojave Road at one point. As I see it, I try to clean it up.

[@ATLparanormalOG]

@@EmbarkWithMark Just had mine yesterday. I had someone play with my radiator cap a few nights back. Then when I put it back on, the rubber seal continued to leak. Got them all over right now except for the shroud. Spray it down with Gunk engine cleaner and then a few minutes misting with the water hose. No high pressure. These old plastic connectors and hoses probably won't like it.