THROTTLE BODY SENSORS (IAC, TPS, MAP) - Jeep 4.0L

[@opener05]

Great explainer. Thank you! Do you have anything about high idle? I changed the IAC, checked vacuum lines and still nothing.

[@DEInTheGarage]

Did you try cleaning the throttle body? Sometimes the build up on the throttle body or inside the IAC housing will cause a high idle situation. When you checked the vacuum lines, how did you do it? Leaks can be hard to detect and even a small leak (a stretched elbow fitting or hairline crack) can cause a high idle. 4.0's are notorious for vacuum issues. Outside of the easy stuff, check that the wiring on your IAC is all intact. I have heard of cracks in intake manifolds causing idle issues as well. Long story short, high idle can be any number of things, best way to solve it is to spend some time under the hood with a fine toothed comb. Good luck! Hope this helps!

[@opener05]

D&E In The Garage that helps, thank you! I'll check the inside of it on top of the other stuff. Thanks again!

[@seanwaldo9229]

Thx man good vid

[@dragoon9082]

Any tips or tricks to help fight carbon build up or to help prevent it from happening again?

[@donnalynnarmiger6044]

@@seanwaldo9229 I have a 2000 Jeep Grand Cherokee Laredo. I just had the radiator replaced & the first day I had it back it would stall out when I came to a stop. I took it back to garage & it says reset adaptive memory. Could that have fixed it? Now it is stalling out almost immediately. Do you think what you did would help? Thanks!!

[@dashriprock2916]

This is an old video but still helping people . I sure miss a simple carb and distributer .

[@70wolfnipplechips41]

Finally, someone who explains thoroughly, concisely, with enough light to see what he's doing. His calm voice and the lack of distracting music and gimmicks are greatly appreciated. I wish I had found his channel before I wasted so much time. Subscribed!

[@70wolfnipplechips41]

Aw damn! I need you to do more videos. I've been trying to find the crankshaft position sensor on my 2001 XJ for days.

[@DEInTheGarage]

Trying to find it? I can try to do a video on that

[@70wolfnipplechips41]

@@DEInTheGarage I'm sure it would be helpful for many people. My husband took half a day off work, tried to find it for a little, then took it to a mechanic. Wish I could give it up that easy. I get stubborn when I'm trying to figure something out, lol. You do a great job explaining clearly and thoroughly. Keep up the good work!

[@dogbreathmints]

So good to find a thoroughly explanatory expert and this understandable video! What a skill! Thank you!

[@DEInTheGarage]

Glad your enjoyed the vid! Thanks!

[@rafa_8259]

for someone who is still learning about his grand cherokee 01, this is a damn good video, thank you for explaining everything in detail.🫡 salute from mexico brother

[@andrewc.2952]

BRO I'm literally taking my glove off to get to your comment box. Man oh man, you got me through not one but two things I've had holding me up for a whole day in getting my throttle body and IAC sensor off. Dadgum cable #2 was seated in a weird way, so glad I found your video so I didn't break it. Then my IAC was stuck on there bad, I unbolted from the unit but it was still stuck. When you said it should pop off, I got a flathead and sure enough, out it came. I owe you man! 🍺 I have a gorgeous '06 JGCL Ltd. Getting worked done that it's needed for awhile and being able to do it right on my own is just the best feeling ever.

[@chrisb6162]

Man, you are a great teacher. You explained everything clearly and the best part is you gave warning to common missteps that dumb shade tree mechanics like me always make. A lot of videos skip supposedly easy steps but when I'm doing repairs on my XJ there is a lot of new territory and I don't even know the basics yet. Your explanations of what the MAP, IAC and TPS do was the best I've seen. I plan on cleaning my throttle body this week or next. Thanks for posting this.

[@mavrikdesign4037]

Bro this has had to of been the most helpful video I have found for the nightmare I’m trying to have my wife drive.

[@MericaUnited]

5yrs later your video is still helping people. Thanks man!

[@parappa982013]

Literally the best video I've found for my Jeep. Super informative. I'm not really familiar with American vehicles and I always say the throttle body is a great place to start on any vehicle. Absolutely perfect video.

[@DEInTheGarage]

Very true!

[@stonewallcrippen2237]

Just FYI, you can simply release the latches on the airbox and remove the lid...which will get all the air intake apparatus out of your way. Hope that's helpful

[@agnew82]

Thanks for the tip!

[@107649365]

Screaming it...Stop twisting the intake tube

[@agnew82]

My error code is P0505 aka IAC valve issue. My Jeep dies at stoplights, barely made it home recently so cleaning all of these components is critical. 60k miles, 2004 WJ...probably never cleaned! Excellent presentation, incredibly helpful, thank you!

[@knighthawk3110]

M.A.P. - Manifold Absolute Pressure 😉 Great video only thing I can add; When working on vehicles, any time you create an opening (such as removing the throttle body) to the engine, it's best practice to cover that opening! Tape, clean rags, whatever works best for the situation. Keep calm and Jeep on!

[@ChrisTheAdMan]

Great video! And right on time, too. 98 ZJ here, same engine, bout to replace the MAP but didn't realize about the other sensors. Also, same issue regarding "bad tranny." I'm new to car repair and really appreciate your thorough but plain spoken description of this project. Thanks

[@shoreline780]

I never knew?! I had no idea I should clean the throttebody. I stumbled across your video as I was kooking for info on the throttlebody for my XJ.You explained everything very well and easy to understand.Thanks very much!! Keep up the great work!!

[@DEInTheGarage]

Thanks! Glad you enjoyed the vid!

[@nathanmccumber8965]

​@@DEInTheGarageI recharge my a/c still blowing hot air I think vent door stuck but heat blows through the vent not a/c.

[@YugoGV]

Thanks for the video, my GC 2004 had codes P 0122 & 0123, watched this video like a week ago. Today I removed TB, cleaned it, replace IAC and TPS...all codes disappeared and running nice! The TPS just broke when I removed the connector. You just saved me $50 - $60 in labor!! Thanks a lot.

[@DEInTheGarage]

Glad to hear it! That was the point here. Glad it worked for you

[@micquelw3709]

Amazing!!! My truck is at the dealership now and they are saying it will cost $1400 to repair the throttle body. I think even a girl like me can do it...thanks a bunch!

[@DEInTheGarage]

Dang... that is a boat load! Good luck DIYing it!

[@chanakyasinha8046]

1400$ 😂😂

[@antigen4]

STAY THE HECK AWAY FROM DEALERS!! horrible ... when i first got my XJ i took it to the deal for new shocks and a 'tune up' ...when you hear that expression - RUN FAR AWAY!!! $1400. that experience motivated me to do EVERYTHING myself from that point forward

[@toastyxtoffy9165]

Glad to know that I won't be the first and hopefully not the last girl to attempt this as well. Way2go sis

[@freedomseeker1966]

Sounds like a good deal if they’re changing the headlight fluid also 🤪

[@macheteafilao13]

D&E In The Garage thanks for posting this video bro! I just swapped out the tps in my wj & it’s shifting much better now. I was thinking my transmission was going bad but I saw this video & it fixed the problem.

[@DEInTheGarage]

Hell yea!! Glad this helped you

[@tblack4428]

I have a 1994 Jeep Grand Cherokee with a 5.2 L V8 and am replacing my IAC soon (engine randomly stalls). I appreciate your explanation of all of the sensors connected to the throttle housing and what they do and what symptom problems each one may exhibit when they start to fail. I will be pulling my throttle housing off of my engine to do a thorough cleaning as you had suggested to get all of the carbon deposits off of the throttle housing for a better running engine. P.S. I also suggest having one of those long retractors tools handy when working on this area as I initially dropped a cleaning pad down into the throttle housing body and had to walk to the auto supply store to get one to retrieve that cleaning pad. Live and learn.

[@DEInTheGarage]

Good luck with the new IAC. Hope it fixes your issue

[@YGOinthe540]

I know this is an old video but man this video helped me out so much. I was having some random stalling and taking a bit to start back up and I was at a lost. I replaced my PCM bc it was randomly not getting power to the fuel pump and it seems to run slightly better but now I'm thinking highly about the IAC. Thank you so much man

[@nathanmccumber8965]

Where is the pcm at ?

[@JLuxie]

Dude, Thanks so much from Australia. I bought an 04 WJ with 116000kms (70000miles) on it and she threw code P0123 at me yesterday, was just gonna replace the TPS but i think ill clean the entire throttle body now. Only downside is that parts here are a little more expensive, 155aud for the TPS. Love your work.

[@DEInTheGarage]

Good luck! Glad the video was some help

[@selene10151991]

Very explanatory!! Helps a bunch. Almost blew $500 on several parts I thought it would be. But I always am looking for videos like this to help me explore my Jeep more. 😀😊👏👍👍 Lol

[@DEInTheGarage]

Glad it helped. Thanks for the feedback!

[@dizzywillow2162]

thanks, great video! i have a 98 TJ with a stalling problem. I called every Jeep dealer within 100 miles and not one of them will even look at it. they all say they don't have the equipment to diagnose a TJ! I called Picayune, Slidell, New Orleans, Gulfport, Biloxi, and Hattiesburg. Guess I am on my own with this thing so will start with the throttle body and associated sensors. I will be viewing this video repeatedly for sure!

[@DEInTheGarage]

I cant believe they said that! Hit up JeepForum. Those guys know everything

[@ralphnabozny8494]

wow you are experienced on jeep. my 92 just got its 1st carb clean today. left it on. may be 20 seconds in and out. Thanks; I'v been muddeling through; 3 days now. approach and avoidance.

[@richardschieffer4518]

Thanks for not pretending to know-it-all. You already know A LOT! Does not having the wire through the accordian hose mean that I don't have a Mass Air Flow Sensor on my 1999 Grand Cherokee 4.0L? I have been getting intermitant engine cut out while driving down the road. Some folks attribute that to the MAFS. I bought it with 60K miles on it and put another 145K on it. The rear driver window started opening whenever it felt like it. I installed a salvaged Body Control Module and it still does it. My next guess is the window control inside that door. Any other suggestions? I am glad you like making these videos. Please continue!

[@kyle5555]

wow. :-o i was shocked when your hood actually opened and stayed open with the struts.

[@DEInTheGarage]

I have owned several WJs and learned that the first bit of cash you should throw at a used WJ is the $40 on new gas struts for the hood.. you are gonna be spending enough time under there :-P

[@willfreethemfreethem7671]

Mine still works 04 grand Cherokee Laredo 4x4

[@radciff2281]

I just use locking vice grips 😭😭

[@stevenm7566]

Can you put gas struts on an XJ?

[@MikeSmith-fq5dv]

My 04 is the same way. That must be pretty common

[@jct19122]

Thank you very much I have a 08 jeep commander and I am having issues. You video has clarified some issues that I had before such as getting to know all the sensors. You've made it very simple to understand.

[@DEInTheGarage]

Thanks. glad you found it useful

[@innergoof19]

Great video and info, thx! My 1996 grand cherokee is having shifting problems and this video helped me understand the parts. Now when I go to my mechanic, I'll have some ideas to share with them.

[@DEInTheGarage]

Check that TPS. It is a HUGE weak point for the Jeeps with the fuel injected 4.0. Good luck!

[@donlum9128]

The 2002 4L WJ(wife jeep) 150k miles idled very rough was hard to start. I replaced plugs, fuel filter, & coil pack still had same issues. Next day replaced crankcase vent hoses, and the manifold vacuum hoses. All old hoses were cracked. Fixed rough idle and stalling but still hard to start, runs good once started. Found out the new Auto Zone fuel filter didn't have a regulator. Replaced with Advanced Auto filter. Used anti seize on the 4 throttle body bolts. I always use Anti-seize. Runs good.

[@shiella2012]

Thanks for your time. Your way of explaining is spot on! On my list 9f Spring Jeep projects! Cheers!

[@abelc5155]

Thanks Bro! Very detailed directions, please keep doing these Jeep videos. My Lisa sure needs the help. Thank You

[@vickirichardt1885]

I love this video. I love how you go into detail and you show how to unplug the sensor. So thanks great video...

[@DEInTheGarage]

Thanks for the feedback! glad you enjoyed it.

[@lilcheetah28]

Thanks, good video. The mechanic charged me to diagnose $250 and said, "we don't know what is wrong." "It might be the MAP sensor." They first said the tranny. I changed the map sensor. Didn't fix it. I am going to go pick up the TPS and the IAC.

[@garyd.7294]

Thanks Bud, haven't reached out in years. I've got another 01 grand. Core 4×4/ 2.5 coil lift, adjustable trac bar, everything underneath. My idle started increasing to about 1000 rpm's out the blue. Thank s for the video as old as it is. I know the problem.

[@CameronDC-Grimes]

I wanna thank you for that info. 02 Jeep Grand Cherokee Laredo V8 here and I've had the launch forward on 1, 2 and 3rd gear before and it turns out i had bad IAC Valve like you said. Seemed so much like it wAs my trans slipping or a band slip. I have a IAC Valve and Throttle Position Sensor on the way from Rock Auto both under $15 each. I also smelled fuel on startup with some rumbling and it turns out TPS and IAC Valve do that when they are old and going out. I also put Berrymans Chem-13 injector + fuel system cleaner in my gas tank and it's fixed a lot of the startup problems. Can't thank you enough D&E

[@JackHenryKraven]

D&E, you are the best. Thank you for every video you've made concerning the Jeep 4.0...:)

[@DEInTheGarage]

Glad you enjoy them!

[@JackHenryKraven]

@@DEInTheGarage I'm going to replace all three of those sensors, especially the one that affects the transmission..:)

[@nathanaelkolb4024]

Great video! Very clear and concise. I'm having random stalls, no warning. Almost like key was turn off. Always restarts and otherwise run good. Going to clean these parts.

[@DEInTheGarage]

Good luck! Let us know how you make out

[@joshuakalaniparks9084]

Same here with me... It runs perfectly fine otherwise, but stalls out when idling. My idle has been low, about 500rpm, and I think it's about 700 normally. Anyway, it sucks! I wish I could just adjust a screw to raise my idle rpm! Have a great day, I hope your able to fix your vehicle.

[@nathanaelkolb4024]

Turned out that an O2 sensor wire was dragging on the drive shaft and was shorting out. It eventually burned out the fuse that controls accident gas shutoff system.

[@rc9266]

Thanks Great Video! 6mo with 97xj ! Woo Hoo! Anyway Flushed cooling system then the misfires began making me crazy the put put. Did a in place rebuild, replaced Cylinder head with a 7120 new plugs, wires, h2o pump ran great till the other day. JY trip on Saturday. I 'll be a fixin!

[@onefastcyclist]

Thanks for the great explanation on the throttle body sensors! BTW, with a rough idle I was prepared to remove the Idle sensor, but discovered that the hose clamp securing the filtered air passage to the throttle body had worked loose. Perhaps the K&N air filter aggravated this issue, but it's now another item to frequently check.

[@joebrito2066]

Great video dude. I’ll be doing my XJ this weekend

[@aaronmartinez3177]

Thank you mine just went out and I was driving and it wouldn’t shift, I thought my transmission took a crap too lol but you’ve explained everything so now I know! Appreciate the explanations!

[@DEInTheGarage]

Absolutely. Good luck with it!

[@adamhpope]

this is exactly my issue from 3rd to 4th! sometimes just kick it to 4000rpm to push it into 4. was yours giving a code?

[@laserXperience]

Omg thank you so much for this. The other day my jeep stalled and felt like my trans was slipping and my idle is crazy I was pricing out things in my mind

[@DEInTheGarage]

Glad this helped! Thanks for the feedback.

[@jeffro4kag206]

I went through some puddles, and my 96 Grand Cherokee started missing and wouldn't idle. At first I thought it might be the distributor cap and wires are old. I cleaned the throttle body, and took off the IAC. Cleaned it. Jeep ran great, but then cut off. Restarted but missed real bad. I have some clamps on computer because the 3 plugs were not making a good connection. I guess I'll take throttle body completely off and do what you did in this video. I'm 400 miles away from 300 thousand. I love Jeeps and want to keep it going.

[@DEInTheGarage]

300k?! That is nuts! I would definitely check the TPS if you were in water before it went south. Good luck!

[@bigdogbrown8106]

Great video&instructions.. I recently got a 88 XJ that runs fine sitting,soon as I pull off,it sputters like it's not getting gas, or to much gas/air.Will change fuel filter&check out everything you mentioned. Thanks!

[@DEInTheGarage]

Good luck!

[@sneakthief5724]

This is an amazing explanation! You should do a video on Jeep transfer cases

[@strengthcoachsam]

Thanks man! I learned a lot from this video! Changed out my TPS on my own (this is a big frickin deal as I'm not prone to being mechanically inclined) and hopefully that fixed the stalling and lurching problem. I drove it for a while last night and it didn't do it, but the real test will be this morning after sitting all night!

[@simonfortune7279]

Did it fix your problem?

[@marinellahobbyfarm-manongb4891]

Did it fix it

[@strengthcoachsam]

It did not 🫤

[@marinellahobbyfarm-manongb4891]

@@strengthcoachsam fu*ck my dog, same thing is happening to my jeep

[@GregoryM504]

Has it been fixed? If so, how?

[@NotOfThisGod1]

Thank you so much, best tutorial I have come across for this subject matter. Extremely helpful.

[@DEInTheGarage]

Thanks! Glad you found it useful

[@clintonbuckingham5239]

You had a great explanation on this. Have you ever disconnected the sensor separately to diagnose? my 96 Cherokee classic will only run 10 -15 minutes primarily in hotter weather and just dies at all rpm (idle or going hwy). No noticeable trans issues at all. TPS only removed has high idle then dies. all 3 removed high idle then dies. MAP only idles good but did not have the time tonight to let run more then 10 minutes. All sensors look original with a 200k miles but not sure. Dont have the money to replace all, since i have already did a toon-up with fuel filter, new gas, spark&wires, battery & air filter. it does have a cracked manifold pipe but has had it for the last year and just started the dyeing with this new season? any suggestions?

[@mrkultra1655]

Right on. When cleaning the IAC housing once it’s removed from the throttle body, what have you resealed it with. According to my guys at the local Dodge dealer parts department, a gasket for that was never offered.

[@ottothom]

Very helpful and cheap fix. I’m having a lot of the issues you’re talking about as systems on the new Jeep I bought. I thought these were transmission related. I haven’t checked the throttle body but I have a feeling this will help with my P0171 code I’m running and my idling and shifting issues.

[@DEInTheGarage]

Good luck!

[@bdub843]

Thanks man. Was just going to clean the TB but now I think I need a new TPS. Sometimes I have a little trouble getting between 4th + 5th when I get on the freeway.

[@DEInTheGarage]

I would give that a try for sure

[@10richfg]

My TJ takes along crank to start and sometimes two cranks, I changed the pump, cleaned the injectors replaced the spark plugs and still the same problem, I'll appreciate an advice, thanks great video !!

[@DEInTheGarage]

Hmm... I assume you dont have any Check engine lights? You can try disconnecting these sensors one at a time to see if there is any chance./ When they are disconnected the ECU (obviously) cannot read them a reverts to a standard setting. if you disconnect on and your long crank goes away, that sensor needs to be changed. FYI, disconnecting these WILL throw check engine codes, but they can be cleared ant they will not come back. feel free to email me if you want to chat more about this issue [e-mail]

[@351cleavland]

I got know my throttle body finally! His name is Phil, he LOVES air and his favorite letter is "O."

[@iLLbReaD]

Thanks man. I had a TPS code pop up when I went to smog my TJ. I'm going to clean the throttle body and replace TPS sensor. Video def helps.

[@DEInTheGarage]

good luck!

[@zippaman100]

Accurate 4.0 knowledge. Always in fashion.

[@scottleachman9847]

That was best explanation I've ever heard

[@OfficialDangus]

Perfect explanation of the air intake. Im currently dealing with a strange problem on a 2000 Jeep Grand Cherokee Loredo. I replaced the crankshaft position sensor in the fall, in the hopes it would solve a strange "shuddering" and stalling, particularly after the car was run for a while and THEN restarted. Like when you go to the store and come out. So I replaced the tps and the cam shaft position sensor. I'm wondering if while putting in the tps, I created a vacuum leak at one of the rubber boots. That, or when I attached one of these sensors I didn't align it properly...also the evap purge solenoid is clicking like a metronome (normal?). I have yet to do another throttle body cleaning (although I did it 6 months ago), or install a new idle air control valve, but I have a new one and am going to attempt install and hope all of it works.

[@ryanellis5902]

@DangusMcShwangus Did you figure anything out about the purge solenoid clicking..? Mine does the same thing occasionally.. I recently cleaned the throttle body and replaced IAC/TPS bur didn't touch the MAP. (The solenoid has done the clicking both before and after serving the TB.) I don't get any stalling or high idling, but It does seem like the engine "stumbles" a bit during idle. I also just changed out my spark plugs, wires and cap/rotor on distributor. Thanks in advance for any info!

[@thewes4743]

Most helpful video I’ve watched so far! Thanks

[@DEInTheGarage]

Thanks for the feedback! Glad you like it

[@leeman21]

Observation. Just remove the air filter cover for more room. 4 clamps :( also, when removing the throttle body cables, make sure you show exactly how to remove them. I thought i could just "pop" off the cruise control cable. Well, I broke the the plastic piece. Try replacing that :( I had to get one made with a 3d printer. Instead, you need to 'slide' it off the cable. I ended up super gluing it back together but it was definitely a problem that could have be avoided. Anyway, just trying to give some advice to someone who may have this problem. Cheers

[@DEInTheGarage]

Yep, I watch this video now and cringe that I didn't think to pop the entire air box assembly off. It is hard to watch. Haha. You are absolutely correct about that and the throttle cables. Thanks for the feedback

[@maryholtz2185]

Amazing mechanic so wish you were in mich. to call and pick your brain ,my best friend just passed away and he was such a blessing with helping car problems 😢😢

[@lindahogg]

Thank you so much for showing me all this I am having trouble with some of the things that you're talking about that ECU I am going to replace it and see if that helps so glad that I found you on here I subscribed and I will be watching more thanks

[@DEInTheGarage]

Good luck!

[@Mrfreshpoptarts]

Thanks for Sharing your experience. Very informative 👍

[@laragreene8328]

GREAT VIDEO...exactly what I was looking for!! 👍

[@khross73]

Great video. I have a 2000 Wrangler that idles kinda rough and when you put it in drive or reverse with the break on it is rough as well, almost seems like its pushing too hard against the brake. Put in neutral and it smooths out or when you drive it seems ok. I bought an IAC and TPS for it. Taking the throttle body off definitely seems like the easiest way to replace the sensors.

[@DEInTheGarage]

Yea, it definitely is. Good luck with it!

[@khross73]

@@DEInTheGarage I went and had the codes read again and its showing P0172(running rich). The guy I bought the jeep from replaced the IAC and TPS before I bought it. I'm googling but if you have an suggestions from past experiences I'd love to hear them. Thanks!

[@DEInTheGarage]

@@khross73 I would definitely confirm that everything on my throttle body was clean. IAC and TPS should not effect mixture, but the MAP sensor could if it was faulty or the rubber hose which connects it to the TB was ripped or missing. Usually a rich/lean situation end up being tied to an O2 sensor. I would definitely check the rubber hose on the MAP as there is no code specifically for the MAP, it just makes the engine throw other codes like running rich

[@khross73]

@@DEInTheGarage will do. Really appreciate your help

[@khross73]

@@DEInTheGarage Well, changed all 3 sensors, cleaned the throttle body, and checked the map sensor hose. I've seen no change in behaviour. Back to the drawing board :(

[@argonaut119]

Nice job. MAP = Manifold AIR Pressure. My 2010 Jeep Wrangler sometimes kicks up to 4,000 RPM when the speed reaches 55-60 MPH. And then it stays at that rev position for what feels like "weeks" (maybe 10-15 min), even if I slow down to 49. Changed the Throttle Body (since it has the TPS and other hardware integrated into one part) since the old one was in bad shape. This did not fix the surge acceleration problem. Any ideas as to why? Still troubleshooting this. Some mechanics also mentioned that it might be the Accelerator pedal (with its electronics) sending bad info to the throttle body. Have you run across this type of problem before? Anyone else have similar problems? Keep making videos. That helps a whole bunch of people.

[@wahairiwahi2458]

hello… my car have same problem with.. u got the solve now?

[@mattlonproctor7221]

I have a 04 Jeep Liberty, and it's surges like that at times and don't know why I'm trying to figure it out myself. But I'm going to try the throttle body cleaning and all of the above mentioned in this video, what do I have to lose. Good luck

[@marcorubio3496]

Good stuff. I been think of taking off my throttle body to clean it. My idle never been great even after replacing the IAC.

[@DEInTheGarage]

A good cleaning certainly never hurts

[@DBNEBMUSICGROUP]

I've just changed mine and was frustrated, with limp! I brought the BBK 62mm. I also changed the IAC, and the TPS. After I had watched your video I've learned, I never new about the TPS grooves in the interior must be lined up! I have a 93 cherokee xj. I just had to ask, what would be the best way to reset the pin, for accurate throttle setting? Thanks again very detailed and well explained!

[@scotthatcher7090]

Thank you! Very informative my new Jeep owning daughter.

[@josephpaglia9006]

Thanks. Nice job. I'll be doing this with much more confidence now, thanks to your video..

[@57jross]

Great job very informative and to the point. Thank You.

[@jimmyskatevids7791]

My jeeps check engine light is on throwing DTC P0122 throttle position sensor. Symptoms are low idiling and stalling when comming to a stop it usual Idols around 600rpm when starting. I’m gona clean the butterfly out and check the IAC sensor. Along with checking the other sensors. Great video thanks man

[@DEInTheGarage]

Good luck! Those throttle position sensors are absolutely notorious on the 4.0. They go all the time and cause havoc. good news is it is an easy fix

[@robertchapman455]

Good explanations on Throttle Body

[@williamm-lb3ml]

Great explanation of symptoms

[@Gunmetalbluejeeptjs]

Thank you I didn’t know much about the IAC and map sensor , I have a 98 tj 3sp auto , sometimes gets a jerking or bucking in the throttle so I’ve replaced the tps and cps with hv wells sensors but still going to inspect my distributor ect , but never check the iac and map so now I will

[@thundermage13]

Great video! Thanks. I'm tracking down an issue of rough idling when I let off the gas. Maybe this'll help.

[@Coolbreeze1911]

Very enlightening I'll do this on my 04 wj at 212mi thanks Doug

[@DEInTheGarage]

It will probably help a bunch! Good luck!

[@RafaelOrtiz-yt5js]

Your videos are interesting and useful. Thank you.

[@edreiguerrero1817]

Great video. I learn a lot!!!. Question, i was at a stop when my xj start to idle up and down and after maybe like 10 sec. It just die started up again and die again. There is times where it runs like nothing but there is times where it does the same thing. Any idea what it is?

[@DEInTheGarage]

It certainly sounds like your IAC or TPS could be messing with you. Could also be a fuel delivery issue or even a spark plug issue. Do you have the ability to find a junk yard to pull some new sensors to test the theory? If you find the right yard, they should be $5 each

[@jamesmichael3998]

Thanks for sharing this. Cheers from Jacksonville Florida

[@garyd.7294]

Dude, you are a" WJ PROFESSIONAL" because of your knowledge. I do appreciate your videos! I've had my 2000 Grand for 6 months. I love it (it's loaded) but many issues are rearing there head from the previous owner. My front driveshaft cv's wher clicking @ low speed for 2 days & then just went away w/2.5 lift. They don't fix themselves themselves. In your experience what's the best way for a fix? Thanks man!

[@DEInTheGarage]

Unfortunately there isnt really a good way to fix CVs, you just have to replace them. if you are short on cash, you might be able to find some decent ones in the junk yard to get you through another year or two

[@ZenithClarity]

Nice vid and explanation of parts and what they do. I know this is an older video. Have you found that when replacing these parts its a good idea to use some dielectric grease or something to seal connections that will maybe protect the parts????

[@340jd]

Great video, thank you. With the TPS when reassembling can it only go in one way? As in the TPS has to be "timed" correctly with the butterfly shaft. Thanks

[@shitboxoffroad]

TPS was intermittently dying and i thought i had trans issues but i replaced now im running great! 231k miles on a 2000 4.0 grand cherokee

[@jablescobra2573]

Very helpful. Just ordered new sensors. Thanks.

[@DEInTheGarage]

Good luck!

[@kevincoquiicoquii7256]

Literally the last thing I would of thought of. Thanks

[@DEInTheGarage]

Good luck!

[@hubertschwarzer3321]

Thank you very much. Your video helped me to clean the throttle body of my 4.0 Grand Cherokee 2000 and exchange the IOC-Sensor: idle speed is great again. I noted that the screws attaching the position sensor are stucked, I dont want to break anything there. Any ideas on how to get them loose?

[@rollinamerica]

Great video. Wouldn't happen to know the part number foe the gasket that goes between the IAC housing and the throttle body would you? Mine broke when I took it apart. Thanks

[@d.s.2519]

Have you tried using dielectric grease to help keep the water out of your sensor plugs?

[@DEInTheGarage]

It works to a point. Good suggestion

[@cronkthecrunk]

Just picked up a 4.0 ... different animal than what I am use to for sure! I'm over here treating it like my 4.7 "crap they put limeaid in the fecking thing!"

[@DEInTheGarage]

HAHA... Yea, the 4.7 is a great motor, but lots of picky little things to remember. The 4.0 will run on olive oil in the crank case a gatorade in the radiator

[@nestobatista7911]

A little help to this buddy ...Rough idle and shaking on complete stop , if I stop and go on neutral nothing goes on and applying on the gas it hesitates to catch up on speed , hope you can help thanks , nice video!!

[@DEInTheGarage]

Any engine codes?

[@nestobatista7911]

No engine codes

[@DEInTheGarage]

Hmm... without much to go on all I can do is suggest a few thing... Make sure your spark plugs arte good and within spec. Make sure all your TB sensors (from this video) are good and clean. Check that the Jeep has proper fuel pressure (if you take it to a shop they will do this for you for a few bucks). Without any codes, it is most likely one of those main issues... something is preventing it from getting spark, fuel, or proper air..

[@nestobatista7911]

D&E In The Garage alright thanks I’ll have to take a look and see

[@Chilling-b9z]

Hello, I got a P0122 code, so I changed my TPS, but my 2004 jeep Rubicon is still hard to start. I also changed my spark plugs and that didn't help. I wonder if I should change the IAC next. I will look at the wires and ground today.

[@thelostmachine713]

D&E In The Garage can you guys do a video on adjusting the TV /kickdown cable of the wj? According to comments, the videos on here about the wj cable adjustment are backwards. Plus there is only 2 videos & both are horrible! Do us justice for the WJ!!

[@DEInTheGarage]

Yea, we could do that. Are you asking about the 4.0 or the 4.7?

[@thelostmachine713]

@@DEInTheGarageI know the 4.0 would help out a lot of people.

[@ViperGibson]

I have the shifting problem that you mentioned with the TPS sensor mainly happens when going up hills and sometimes from a dead stop, a friend told me he had the same shifting problems, he replaced the TPS and he was fine, so I replaced the TPS in my jeep and I still have the same problem, what do you think might else be wrong? (96 ZJ 5.2)

[@DEInTheGarage]

Is the fuid clean and at the proper level?

[@ViperGibson]

@@DEInTheGarage Yeah that's the first thing I checked when the symptoms started, fluid still looks brand new and it's at the full line, Jeep only has 115xxx on it, after watching this video, and I drove the Jeep today it does bog down some when I'm stopping like it's about to stall, could the IAC with the TPS have something to do with it? I haven't pulled the IAC to check it yet.

[@zeropointenergy1574]

Great video and education. Big thanks.

[@bobatwater5912]

Great video. Helped me on my 1998 jeep wrangler.

[@joshuakalaniparks9084]

What do you think about using gas to clean it? Gas in a spray bottle?

[@DEInTheGarage]

That would work as well

[@611E11THST]

Great video! Thanks for posting it. Keep ‘em coming!

[@DEInTheGarage]

Thanks for watching!

[@CameronDC-Grimes]

It would be cool if you did one of these on the 4.7L WJ. I heard you are supposed to relearn the ECM after cleaning but not the slightest how to do that on Jeep

[@sharlotteseiber375]

Good job, do you have to reset check engine light?

[@christiangonzales5380]

Great video dude I change the fuel pump car worked fine then a day after the truck started idling...only after the car heats up to its level then shuts what can it be thank you

[@DEInTheGarage]

So it idles fine when cold, but shuts down as soon as it reaches operating temp?

[@christiangonzales5380]

D&E In The Garage yes actually I check the fuel pressure it was the fuel pump it was a bad one.as well now it works fine , you should make a video on suspension care

[@BustMonk]

My guess would be the CPS (crankshaft position sensor). I had the same issue... Does it start right back up or do you need to wait a little while? Could also be vapor locking of the fuel rail...

[@newf7777]

Awesome video!! But i did want to ask you. If the map sensor acts up what are the symptoms ? My WJ 4.0 had a prolong start. it's like 10 seconds before it starts. now when it starts. Runs great..