Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here XJ (84-01) Show Engine cranks but wont startNewbie Thread Starter
Join Date: May 2012 Location: Harker Heights, Texas Posts: 3 Likes: 0 Received 0 Likes on 0 Posts Year: 1996 Model: Cherokee Engine: I-L 6, 4.0 I have a 96 Cherokee 4WD IL-6, was running fine the day before and yesterday got up went out to go to the store and it cranks but will not start. I had bought new plugs, wires, cap & rotar and coil but still nothing, i checked for spark and there is nothing. I'm not electrically inclined can someone help me out? Newbie
Join Date: Sep 2011 Location: Crosby Tx. Posts: 27 Likes: 0 Received 0 Likes on 0 Posts Year: 1993 Model: Cherokee Engine: 4.0 I'm having the same issue right now I have a 93. I think it might be the voltage regulator in the alternator but do not know for sure. If you Find the problem please let me know. I will do the same. Thanks Newbie Thread Starter
Join Date: May 2012 Location: Harker Heights, Texas Posts: 3 Likes: 0 Received 0 Likes on 0 Posts Year: 1996 Model: Cherokee Engine: I-L 6, 4.0 no problem CF Veteran
Join Date: Sep 2010 Location: Mercer County, NJ Posts: 12,692 Likes: 0 Year: 2001 Model: Cherokee Engine: 4.0L I6 HO Quote: Originally Posted by VetteGuy04 I have a 96 Cherokee 4WD IL-6, was running fine the day before and yesterday got up went out to go to the store and it cranks but will not start. I had bought new plugs, wires, cap & rotar and coil but still nothing, i checked for spark and there is nothing. I'm not electrically inclined can someone help me out? Possibly the CPS do a search on here for it. CF Veteran
Join Date: Nov 2010 Location: In the middle of Minnesota! Posts: 5,727 Year: 1999 Model: Cherokee Engine: 4.0 The #1 cause of no spark on the 4.0 is the crankshaft position sensor. The #2 cause is the ignition coil. Here's more on the route for "spark". The ignition coil can be tested pretty easily and accurately for primary and secondary resistances with a manual and a meter. The crank sensor can be tested too, but testing is not always conclusive. If you end
up buying a crank sensor, do yourself a favor and buy it directly from Jeep. Aftermarket crank sensors are "hit and miss" with a lot of miss. Newbie Thread Starter
Join Date: May 2012 Location: Harker Heights, Texas Posts: 3 Likes: 0 Received 0 Likes on 0 Posts Year: 1996 Model: Cherokee Engine: I-L 6, 4.0 I replaced the CPS, had a little trouble getting it out had to put all my extentions together to get a good bite on the bolts but they finally broke loose. Put the new one in and made sure everything was hooked up and she fired up on the first crank. Took it on a little drive and she has more power and runs smooth again. Thanks for the advice, CF Veteran
Join Date: Nov 2010 Location: In the middle of Minnesota! Posts: 5,727 Year: 1999 Model: Cherokee Engine: 4.0 Glad we could help. Thanks for updating us; many do not after the problem is resolved. There are 2 groups of XJ owners. 1. Ones that HAVE replaced their crankshaft position sensor CF Veteran
Join Date: Jan 2012 Location: Australia Posts: 2,680 Year: 1997 (RHD) Model: Cherokee Engine: 4.0 ltr Quote: Originally Posted by tjwalker Glad we could help. Thanks for updating us; many do not after the problem is resolved. There are 2 groups of XJ owners. 1. Ones that HAVE replaced their crankshaft position sensor True words. Senior Member
Join Date: Jan 2011 Location: Joliet, Il Posts: 730 Likes: 0 Year: 1996 Model: Cherokee Engine: HO4.0 I6 So I am working on ruling out my cps in my no start no spark jeep. I have an OHM meter and am trying to check the resistance between the B & C pins on the connector.
4:15 in the video is the connection I have. Anyways, the Connection I have on my jeep when I place the leads on the CPS in the jeep I am recording about 700 and on the new CPS I bought I am getting about 540 or so. Could this be my problem? In the video he said I should be getting infinite resistance which I am not getting when I do the same test he does. Will be looking into more options in the mean time. Senior Member
Join Date: Jan 2011 Location: Joliet, Il Posts: 730 Likes: 0 Year: 1996 Model: Cherokee Engine: HO4.0 I6 Quote: Originally Posted by xj guy So I am working on ruling out my cps in my no start no spark jeep. I have an OHM meter and am trying to check the resistance between the B & C pins on the connector. How-To Test a Crank Shaft Position Sensor CPS - YouTube 4:15 in the video is the connection I have. Anyways, the Connection I have on my jeep when I place the leads on the CPS in the jeep I am recording about 700 and on the new CPS I bought I am getting about 540 or so. Could this be my problem? In the video he said I should be getting infinite resistance which I am not getting when I do the same test he does. Will be looking into more options in the mean time. Still not getting anything after I replaced the CPS. I'll have to shoot for the Ignition coil now and see what I get. Junior Member
Join Date: Jun 2009 Location: PHX Posts: 51 Likes: 0 Received 0 Likes on 0 Posts Year: 1999 Model: Cherokee Engine: 4.0 that video was awesome I still hope I don't have to go through all this, but cool video all the same Junior Member
Join Date: Jul 2013 Location: Long Island Posts: 70 Likes: 0 Received 0 Likes on 0 Posts Year: 2001 Model: Cherokee Engine: 4.0 6 cylinder I had a similar issue a while back on my 01 XJ. It would crank, but wouldn't fire. CPS was replaced, but jeep still wouldn't fire. In my case I needed to get a new ECU (00-01 you need to program the ecu... thanks Chrysler). So yeah, although you might think it's the cps, it might not always be. Glad that it was in your case, cant tell you how much poo I went through to figure out it was a blown ECU. Senior Member
Join Date: Jan 2011 Location: Joliet, Il Posts: 730 Likes: 0 Year: 1996 Model: Cherokee Engine: HO4.0 I6 Quote: Originally Posted by survailencewagon that video was
awesome I still hope I don't have to go through all this, but cool video all the same That really is the only way to get to it... unless you cut a hole in the floorboards like some guys do. If you need to get to it I would get a similar set up like he did, but position yourself under the jeep so that your feet are by the passenger door and your head up by the drivers door. With your right arm you can hold the ratchet set up and with your left arm you may or may not be able to wiggle it up in front of the bell housing and reach over and help guide the socket onto a bolt. I would recommend getting the bottom bolt out first as it is less likely to fall into the bell housing, and then instead of trying to pull the top bolt out, Pull the top bolt and the CPS put at the same time. Keeping it together stops the chance of you dropping that bolt into the bel housing. Seasoned Member
Join Date: Aug 2016 Location: Schenevus, New York Posts: 449 Likes: 0 Year: 2000 Model: Grand Cherokee(WJ) Engine: 4.0/4.7 Same issue on my 2001 wj. Changed cps...jeep started and i had it running off and on two days. Took battery out again and repaired a few other small issues over two days, replaced the battery again and won't start, cranks but that's it. Nothing from any of the gauges...Tried swapping cps again and nothing at all changed. Temporarily put in pcm, ign, and security module from one of my 2000 4.0 grands and same exact thing happens. At a loss now. Newbie
Join Date: May 2018 Posts: 4 Likes: 0 Received 0 Likes on 0 Posts Model: Cherokee (XJ) Quote: Originally Posted by VetteGuy04 I have a 96 Cherokee 4WD IL-6, was running fine the day before and yesterday got up went out to go to the store and it cranks but will not start. I had bought new plugs, wires, cap & rotar and coil but still nothing, i checked for spark and there is nothing. I'm not electrically inclined can someone help me out? I have the same issue i tried replacing the cps and ecu still no start could someone please help me out What causes a Jeep Cherokee not to start?The most common reasons a Jeep Cherokee won't start are a dead battery, an alternator problem, or failed starter.
Why will my Jeep turn over but not start?If your starter spins but it does not start/crank the engine then you have a starter problem. The spindle or drive inside the starter is possibly damaged. If the starter is repairable, you can have the drive spindle replaced, otherwise you'll need to replace the starter.
Why is my Jeep Grand Cherokee cranking but not starting?The following are among the possible reasons why your Jeep will not start despite it turning over: Incorrect crankshaft position sensor. Faulty spark plugs. Malfunctioned fuel pump.
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