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Unread 06-06-2013, 05:40 PM   #1
49WillysPU
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1996 ZJ 
 
Join Date: May 2012
Location: Moore, Oklahoma
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I have a 96 JGC with 4.0 and auto trans. About a week ago it died in traffic and had blown a 20 amp mini fuse. I searched the forum as to why it kept blowing the fuse and it led me to check the O2 sensor on the cat. Sure enough the drive shaft had rubbed and exposed the wires. I fixed that. Now it will randomly die. It has symptoms like its out of gas and then dies. I can start it back up and it's usually fine for the trip. It's becoming more frequent. No check engine light comes on. I've read about similar issues traced to the crank shaft sensor. Is this a good place to start. Anyone dealt with this?

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Unread 06-06-2013, 05:47 PM   #2
eagsc7
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Yeah.. Crank Shaft Sensor... Have FUN with the Bolt, and removal / Install. I went thru the Cap, Rotor, Wires, Plugs, and even an ign Col and Distributer before the sensor. I'm sure they May have had something to do with it as well. If it Dies Abruptly, its "Usually an Electrical Issue" says my old mechanic...
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Unread 06-06-2013, 06:02 PM   #3
49WillysPU
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I'm tryin not to throw a bunch of money into it locating the problem. This is the fuse that blew. 2nd down mini 20 on the right. Anyone know what it is specifically?
image.jpg  
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Unread 06-06-2013, 06:08 PM   #4
ZeeJay1997
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PCM and ASD relay
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Unread 06-07-2013, 12:25 AM   #5
nicholasluke27
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1996 ZJ 
 
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Try cleaning your throttle body and TPS
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Unread 06-07-2013, 09:18 AM   #6
PolkaPower
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You can't clean a TPS. But you can clean the IAC valve.
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Unread 06-07-2013, 09:37 AM   #7
HighLonesome
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Tap on the IAC, if it causes a stumble or stall, that is a likely culprit.
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Unread 06-07-2013, 11:30 AM   #8
coralman
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1998 ZJ 
 
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I had the exact issue happen to me, and I hate to say it but the pcm could definately be toast.
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Links to axle rebuilds, mount replace,a/c box rebuild,ect in history section of my profile page
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Unread 06-07-2013, 12:56 PM   #9
49WillysPU
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Had codes read and it showed ignition coil A. Anyone know where it's located
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Unread 06-07-2013, 04:43 PM   #10
coralman
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PO350, 351, something like that? Mine did the same. Ignition coil is on passenger side of block, to the right of the distributor.
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Unread 06-07-2013, 05:22 PM   #11
dellis
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1998 ZJ 
 
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Quote:
Originally Posted by 49WillysPU View Post
Had codes read and it showed ignition coil A. Anyone know where it's located
That code (I'm guessing P0351) is telling you that a monitor of your Coil Driver is detecting an open or short on the ground line to your coil.

Quote:
Originally Posted by coralman View Post
PO350, 351, something like that? Mine did the same.
What happened with your Jeep?
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Unread 06-07-2013, 05:32 PM   #12
coralman
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The jeep gave the coil code but there was nothing wrong with the coil, as I had a spare new one, same result. It started random stalling which got worse and worse,ZeeJay ran me through all the troubleshooting but it continued with the coil code. When the O2 shorted{ thanks to a mech who broke the clip} it screwed uo the driver somehow. New pcm and it has ran fine since. Most likely loose solder joints were already present and the short just made them worse.
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Unread 06-07-2013, 05:46 PM   #13
ZeeJay1997
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That code is a weak coil driver circuit in the PCM, bad coil connector, or bad coil.

Given that the o2 sensor shorted out and you havent touched the coil, I'm leaning towards the PCM.

If you're very fortunate, it may only be a coincidence that the connector or coil is bad.
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Unread 06-10-2013, 10:49 AM   #14
49WillysPU
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Replaced the ignition coil Saturday and so far so good
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Unread 06-13-2013, 09:44 PM   #15
DickDickle
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Quote:
Originally Posted by ZeeJay1997 View Post
PCM and ASD relay
So would a bad pcm cause that fuse to blow?
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