Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
shamalex72

2001 Jeep Grand Cherokee Stalling

10 posts in this topic

Occasionally when I stop at a stop sign the engine will die and sometimes when I am just slowing down for a stop sign or a turn it will die, sometimes it will restart, sometimes it won't. If it does not die completely it will lose all power as I am driving. I will have my foot on the gas pedal and the gauges will quit and the Jeep will lose all power for a second, without completely stalling. Since it does not do this all the time the mechanic tells me nothing is wrong with my vehicle. We have replaced the battery and fuel pump. Any suggestions on what else to try. (2001 Jeep 4.0L) Thanks

Share this post


Link to post
Share on other sites

Crank Position Sensor....Been there, done that.

About a $25-$35 part, but it can be a bit of a pain to get to. You need to go through the passenger-side wheel well. It is located in the block. Be careful, it is plastic, and if you break it off, it will cost you a trip to the shop.

Actually pretty easy to replace.

Glenn

Share this post


Link to post
Share on other sites

How many miles on it??? Could be the O2 sensor also. I have the same engine in my Jeep, there are 2 of them though and they are not that cheap $75 a piece. THey are on your exhaust pipe, one just coming out of the manifold and the other on your catylitic converter. Same signs mine was showing. Hard to tell if there isn't a check engine light coming on to send a code.

Share this post


Link to post
Share on other sites

Quote:

If it does not die completely it will lose all power as I am driving. I will have my foot on the gas pedal and the gauges will quit and the Jeep will lose all power for a second,


All the gauges go to zero like you shut the key off? Or the tach goes to zero and all the other gauges operate like you just turned the key to the on position along with all the warning lights coming on as it stalls?

Given the history of crank sensors on these vehicle it is likely. typically what they do is short out the supply voltage which is shared by a number of components including the coil if I remember correctly. No power and no crank signal will stall an engine in a hurry!!

The first thing I would do if I where looking at this vehicle and the problem was present (crank no start) is check fuel pressure (should be good since the pump was replaced) next I would check for spark (likely this is not present). As soon as I saw that there was no spark, if this is the case, I am backprobing the connector for the crank sensor to see if there is voltage. If there is none I would unplug the crank sensor. If voltage returns I know the crank sensor is shorted and this should fix the problem. I should note that when checking for power at the sensor you will have to either cycle the key or give it a quick crank to re-enable the ASD relay.

Although O2 sensors get replaced all the time, typically for burnt out heaters and being lazy, they rarely cause drivability issues and are even more unlikely to cause a vehicle to stall. With most new cars having up to four and I think I have seen something about 6 this can get to be a pretty expensive endever.

Share this post


Link to post
Share on other sites

Airjar,

If eng. dies and will not restart because of crank sensor concern, you should be able to unplug crank sensor and pcm will go into a lip mode. Eng. will start, but run funny and possibley shift funny. This may applie to cam sensor only. I still scratch my head when people would come into dealership with a driveabilty concern (running rough or stalling) and the first thing they say to you is "I changed my o-2 sensors and did not help". I do not know who started this method of diag., but people end up spending more money than they should by "shot gunning" parts at a concern. I do not think there is any service interval on o-2 sensor's yet, but the public seems to think there is. Good luck!

Share this post


Link to post
Share on other sites

Its airj"E"r !grin.gif

I don't know who started the o2 myth either.

They will not start with the crank unplugged.

They other thing a do it yourselfer can try is a good throttle boddy cleaning. Pull of the air snorkel at open up the butterfly if its black it you may as well clean it (engine off of course). Carbon buildup can cause issues with minimum air which chrysler bases idle off off. The IAC (idle air control valve) could be carboned up as well. I've had pretty good luck cleaning these and having them work as well.

Share this post


Link to post
Share on other sites

Sorry crazy.gif. The old throttle body clean. Pays .8 to 1.0 to perform and gets you better gas mileage. I believe Chrysler is the only manufacture you can do this to. I know ford has Teflon coat inside throttle body. Cleaning removes this and manufacture does not recommend. I think cleaning throttle body on Chryslers helps adjust min. air rate. Make sure they remove throttle body. Alot of tech's would charge out gasket, but never remove to clean.

Share this post


Link to post
Share on other sites

I don't think I have ever seen anybody remove one to clean it. I suppose if it is real dirty its no a bad idea! We still clean quite a few Chevys, Especially the newer pickups and full size suv's. See a lot of sticky throttle plates on those! As far as the fords if its all gummed up, black and nasty it gets cleaned coating or not.

Share this post


Link to post
Share on other sites

It was part of a service that a couple of dealerships I worked at had been offering. Both Chrysler dealership's had issues with tech's not removing throttle body (cutting corners). It was part of the service they sold and tech's got paid for it. I, my self would just clean with out removing I suppose. Most tech's do say you do not have to remove.

Share this post


Link to post
Share on other sites

My wife brought the jeep in today and had the crank position sensor replaced. So far, so good. Yesterday it stalled three times for her. Hopefully that was the problem and she won't have anymore troubles. Thank You for the suggestions.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0



  • Posts

    • Troy Smutka
      6/24/17     Got out on Washington this morning to target walleyes. Cold and windy! Busy today--a bass tournament going on. We fished several spots with leeches under a slip float for eyes. Only caught one small one, and missed a couple bites that might have been walleyes. Did catch several medium to large smallies and one largemouth. Got off the lake about 10:00 as we saw the first wave of rain approaching. Not interested in fishing cold, wind-driven rain. Guess mother nature doesn't always look at the calendar, which said summer started this week. Good luck, and I will see you out there somewhere.
    • ZachD
      wrap a bungee around it
    • ZachD
      Then Crooked lake pier fits the bill they like corn or worms   or what city are you looking around?  
    • birdguy
      Just back from Big Sandy, fished the main basin and concentrated on two humps. Caught five walleye and kept three that were in the slot, all about 15 inchers. Quit sooner than planned as the wind really started kicking up. Leeches, lindy rigs, red hooks and a green bead did the trick. Tried spinners and crawlers with no luck. All were caught in 9 - 12 FOW.   BIG fire in McGregor this morning, a trucking business on the east end of town burnt down.
    • Chevy Nation
      Alright, so I got out yesterday in the early afternoon I decided to go try the Mississippi there is this little public boat dock, so I dropped a line there and within the hour I got a Northern Pike it was about 24 inches long and then about a half hour I pulled in a blacktail redhorse an it was about 12 or 13 inches long. So not a bad day out there on the river for dock fishing! I caught both the fish on them green night crawlers, I also tried throwing out a crank, a jig, and a watermelon Senko. All they wanted was them green worms! Thanks for the tips I finally caught a couple fish (hopefully there is more to come)
    • monstermoose78
      Awesome 
    • monstermoose78
      Fresh laker this morning for breakfast yum
    • nmitchell17
      No need for big ones, thanks for the advice
    • ZachD
      Nice video!
    • ZachD
      Well if you are looking in the Minneapolis lake nokomis has a fishing pier   North metro Crooked lake in Andover has a pier. There is a nice park as well and all the sunfish you want to catch no big ones though.