Jeep XJ - P1391 Rough Idle & Stall Problems Solved! Crankshaft Position Sensor (CPS) Install

Рет қаралды 21,939

Жыл бұрын

Our rough idle & stalling problems (P1391 error code) woes in the Sandbox (1999 Jeep Cherokee XJ) continued to haunt us even after deep cleaning the throttle body & IAC sensor. In this video we tackle the next possible culprit and replace the hard to reach crankshaft position sensor (CPS) in the Jeep. And guess what -problem solved!
#offroading #jeep #jeepxj #rockcrawling #DIY #crankshaft #mopar #errorcode #checkengine #jeepcherokee #jeepcherokeexj
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Пікірлер: 102

@chrisbenson9507 23 күн бұрын

Thank you both so much. My offroad sleigh has been giving me grief for some time now and I've spent more money than I should have to fix the problem. Santa's going to have to leave something special for both of you under the tree this year. On a side note, Preston's smile in infectious and Mrs. Claus says Preston is "Just the cutest and most precious mechanic she's ever seen."

@sandbox_adventures 22 күн бұрын

Thanks! Preston does have a pretty infectious smile and laugh too once you get him chuckling.

@lucasmartin7729 Жыл бұрын

I absolutely love you guys. Super cool father/son dynamic, makes me so excited to be a dad and do this with my son. Preston’s gotta be the best shop assistant I’ve ever seen, wish I had him to help me on my XJ! Keep putting out great videos guys, god bless you!

@sandbox_adventures Жыл бұрын

Thank you! That means a lot to us. And yes, we do have some more XJ projects in the works.

@jimamccracken5783 Жыл бұрын

You guys are top notch on things. I love the way you intereact with each other a handicap does not limit these two. Keep doing this the LORD is showing us what yall can do.

@sandbox_adventures Жыл бұрын

Thank you for the kind words.

@johnbarker8239 Жыл бұрын

I think that is so cool that you let you son help you like that. What a great dad. I try letting my son help me but he always wants to take something else off that don't need to be. Lol. God bless you and your family. Have a great day. 👍

@sandbox_adventures Жыл бұрын

Thanks! When Preston was younger he would wander off with a tool lol.

@wreckerman4691 8 ай бұрын

Just got a 93 Jeep Grand Cherokee thanks for your guyses help

@sandbox_adventures 8 ай бұрын

Rock on! There fun jeeps

@someguyonline377 Жыл бұрын

wow looked like a job, nice job Preston!

@sandbox_adventures Жыл бұрын

It definitely wasn't the easiest sensor to reach, but the Sandbox goes vroom now so it was worth it!

@jdsilvaca 10 ай бұрын

Ear muff time... i love it. Nice work!

@sandbox_adventures 9 ай бұрын

Thanks!

@Christinalynn92 7 ай бұрын

Love Preston's KZfaq channel!! So awesome 😊

@sandbox_adventures 7 ай бұрын

Thanks!

@rickcooper6817 Жыл бұрын

Good job fellers. Preston now that you know how to do that, you can come do my old 88 XJ. I've already been through the same steps you guys have up to that point. I picked up a new starter this morning because the old one was starting to give up, so I figure might as well to both at the same time. Have fun wheeling guys! Thanks for the videol

@sandbox_adventures Жыл бұрын

Thanks and good luck w/ the starter! We're going to try to hit the trails this weekend if the weather plays nice.

@greghuber9773 Жыл бұрын

Your sensor is not the same as his . Your 88 has a 2 wire sensor that generates voltage. His is a 3 wire sensor with a reference 5 volt signal .Yours can be adjusted by carefully tapping it closer to the flywheel .You want it over .500 millivolts while cranking .I used to get them over .750 without hitting the flywheel .

@johnnyberlinn1663 Жыл бұрын

Well done. Hope that fixes the problem! My 97 ZJ 4L hade the same problem but the fix for me was replacing the pcm with a updated one from pick and pull hope yours is fixed

@sandbox_adventures Жыл бұрын

It's funny you mention that. I actually went to a local pick in pull to see if I could salvage a mopar CPS from an XJ, but the transmission and engine were already gone. Here's to hoping the Duralast brand lasts...at least until the mopar version gets shipped.

@danieljohnson8437 Ай бұрын

Excellent

@prestondallas4035 Жыл бұрын

Hey Preston...I'm Preston too....I have an XJ too..... and I like to keep my hands clean too! ( I don't know if they make the latex gloves small enough for your hands, but that's how I help keep my hands clean...kinda lol!)

@sandbox_adventures Жыл бұрын

LOL! Small world sometimes. I guess owning an XJ and keeping your hands clean is a Preston thing :)

@deadspeed6679 Жыл бұрын

Have some rough idle issues hopefully it’s my CPS too thanks for the help guys

@sandbox_adventures Жыл бұрын

No problem and good luck!

@deadspeed6679 5 ай бұрын

The original owner cut the harness and spiced it directly to the sensor can you tell me what colors are on the harness right to left ?

@sandbox_adventures 3 ай бұрын

Sorry- I just saw this. Went and looked at the harness. The wire color- looking at the wires feeding into the plug with the release tab visible- goes left red, middle black, and right white. Hope that helps.

@revbikerbigd8664 11 ай бұрын

Pc of Napkin in socket to hold bolt in it works to get bolt started with extension!

@sandbox_adventures 11 ай бұрын

Now that’s a good trick right there. We’ll need to remember that one.

@Tpbmods Жыл бұрын

Ive been putting off doing my CPS for like 3 months now. cracked the housing when I rebuilt my trans, ended up JB welding the crack for the time being, but its definitely got some intermittent issues

@sandbox_adventures Жыл бұрын

Intermittent issues can be a bare to figure out sometimes. Good luck w/ the fix!

@ala1998mc Жыл бұрын

i have 6 bad crank sensors sitting in a box behind me all because i kept buying the cheep ones. auto zone wanted $80 when their cheapest use to be $12. get a ntk one from rock auto, it really is like the best one you can get.

@sandbox_adventures Жыл бұрын

Oh man, I hope we don’t go through 6 of them- that would not be fun lol. Thanks for the tip on the NTK from rock auto. We’ll keep that in mind if the Duralast one craps out on us because the Mopar one never came.

@andrewcheatle4691 Жыл бұрын

My CPS went out about 4 years ago and I didn't have much money at the time so went with a Standard brand CPS - even though I was pre warned not to cheap out. Maybe I was lucky but it's been perfect so far. Used standard also for my cam sensor and other parts - no issues so far. I did use NTK for my O2 sensors though...

@ala1998mc Жыл бұрын

@@andrewcheatle4691 i might just have terrible luck then. the dealership was only able to get newer styles and all the cheaper ones broke on me within minutes, the part store ones lasted a few month each, but the rock auto ntk made it run smoother than it ever has.

@sandbox_adventures Жыл бұрын

@@andrewcheatle4691 Fingers crossed ours makes it that long!

@sandbox_adventures Жыл бұрын

@@ala1998mc My wife jokes that I have a permanent black cloud hovering over my head raining down back luck on me.

@Lucky-ou4vz Ай бұрын

Nice 🙂👍

@sandbox_adventures Ай бұрын

Thanks 😁

@Lucky-ou4vz Ай бұрын

@@sandbox_adventures you're welcome

@JasonExplainsThings Жыл бұрын

All my socket extensions... ASSEMBLE! 🤣

@sandbox_adventures Жыл бұрын

HAHAHA! That's funny right there lol

@Rmehki Жыл бұрын

I’m not misfiring or throwing codes, but when idling hot or cold the tach bounces and idles a little rough. Occasionally I’ll stall out. Did you have a similar rough idle like mine?

@sandbox_adventures Жыл бұрын

That’s how it started and then progressively got worse over the course of a couple months. I don’t think a code popped up until it stalled for the first time.

@Gareth96v1 9 ай бұрын

My '97 does it every once in a while, but turning the ignition on/off 5 times quickly resets it. Computer has to re-learn everything, but it's not too bad.

@sandbox_adventures 9 ай бұрын

That’s Interesting. Jeeps sure can be crazy weird at times lol

@user-sd8uu3zr3t 4 ай бұрын

im just wondering if this solved the idle issue you were having ive been chasing the something ive replaced everything on the throttle body and still have issue with idle but when in gear no high idle

@sandbox_adventures 4 ай бұрын

We’ve been issue free since we installed the Crankshaft position sensor. If that didn’t work for us, we were going to look into the Camshaft position sensor next. Hope that helps and good luck!

@MajorWeakness Жыл бұрын

I guess it worked!

@sandbox_adventures Жыл бұрын

So far so good! We have about a week of drive time in it now and still holding strong ... knock on wood lol

@MajorWeakness Жыл бұрын

@Sandbox Adventures I've got Mopar sensor in my glove box just incase Lol. I got it before I went on a cross country overland trip just in case

@sandbox_adventures Жыл бұрын

I’ll be doing the same if they ever ship the mopar sensor I ordered lol

@rodneyyamat41580 Жыл бұрын

Does it still works after you replaced the cps?

@rodneyyamat41580 Жыл бұрын

My keep is having the same problem.

@RealGreene03 Ай бұрын

Do yall have any sandbox stickers

@sandbox_adventures Ай бұрын

Not currently, but Preston has been saying we should get some.

@michaelkannard7149 Жыл бұрын

It’s easier to remove it from the top. Unbolt the fuel like off the intake and get you an 11mm wrench. Takes me 10 minutes.

@sandbox_adventures Жыл бұрын

We'll keep that in mind if the TPS sensor craps out on us!

@ulianotech Жыл бұрын

ive changed my crank sensor, cam sensor, plugs, cap rotor, and im still misfiring and sputtering. gonna try and change o2 sensor but even unplugged nothing changes. im thinking bad PCM. i am getting the same code p1391 after all parts replacements. im also getting a p1698 no ccd trans bus messages (bad tcm?)

@sandbox_adventures Жыл бұрын

Whoa, that sounds super frustrating! I've read in the jeep forums that sometimes aftermarket parts can be faulty and send you down a rabbit hole thinking it is something else b/c you just replaced the part. I'm still waiting on the mopar CPS myself. Hopefully swapping the PCM will get you running. Good luck!

@ulianotech Жыл бұрын

@@sandbox_adventures yeah what's weird is every time i change a part things work then new shit breaks. currently i am sputtering because my battery wont hit the proper voltage. before it was not doing that. i am assuming all the damage these other misfires caused, made the alternator shit the bed. going to try, o2s, alternator, fuel pump, then ive got nothing left but the pcm. i will; try and come back to update yall

@sandbox_adventures Жыл бұрын

Please do! I'm curious to know what the actual culprit was in your misfiring & sputtering.

@andrewcheatle4691 Жыл бұрын

I had similar problems and replaced plugs, wires, coil, distributer, crank/cam sensor...but only when I replaced the O2 sensors did it cure it. NTK are the ones to go for, good luck 👍

@ulianotech Жыл бұрын

@@andrewcheatle4691 im wondering if its really going to be that easy. Right now she wont even crank over fully. She sputters and spits and pops and battery guage is not going up all the way. seems like everyday its getting worse. Im changing the o2 tomorrow morning. If that fails im gonna try another PCM

@awdsie9902 10 ай бұрын

I have done 3 so far in my 01 xj 😅 I also have a rough idle that i cant fix, did all i can do and nothing worked so it lives with a rough idle now lol

@sandbox_adventures 10 ай бұрын

Oh dang, that would be super frustrating for sure! I was starting to get a little nervous at what the next solution would be if it wasn’t the crankshaft position sensor after messing with the throttle body. I think the camshaft position sensor was next on my list but luckily we didn’t need to go there.

@alberthunt8501 10 ай бұрын

Drop the front driveshaft easier to get to

@sandbox_adventures 10 ай бұрын

Fingers crossed I won’t need to any time too soon but I’ll keep that in mind the next time I need to squeeze my arm up in there lol

@alberthunt8501 10 ай бұрын

@@sandbox_adventures get a 3in extension with a 6in extension with a stubby rachet and can get the bolts out once I figured the little trick I done it within 10 mins