96, Cherokee sport. cranks but wont start. - JeepForum.com
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Unread 08-09-2014, 02:10 PM   #1
wilding592
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96, Cherokee sport. cranks but wont start.

simply put, when the key is turned the girl will crank but just wont start. iv got power, i can hear the fuel pump starting, iv replaced the ignition coil and the crank position sensor. and i still dont get a spark, and last iv hooked up a coder and it keeps saying no codes available.

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Unread 08-09-2014, 02:49 PM   #2
chris87xj
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Have you checked the 30a mini fuse in the PDC? blowing fuses and can't figure out why
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Unread 08-11-2014, 06:37 PM   #3
wilding592
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I'v tested all the fuses and they seem to be fine.
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Unread 08-11-2014, 07:17 PM   #4
chris87xj
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At the risk of being redundant but just to be sure , you've verified or changed out this 30 amp fuse?
1996xj-pdc-30a-mini.jpg  
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Unread 08-13-2014, 08:03 PM   #5
wilding592
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it was a good thing you were insistent because i managed to over look those when i tested the fuses, and yest the 30 was blown, i just got done with it and i replaced it twice and it kept popping, any ideas?
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Unread 08-13-2014, 08:41 PM   #6
chris87xj
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That fuse supplies power to the coil - as well as the O2 sensors. O2 sensors often short out at end of life. It takes a while for a bad O2 sensor to generate a CEL. A good rule of thumb is to replace them every 60k miles.

I would unplug both O2 sensors and replace the fuse then see if she'll run like that. If so it's a pretty good indication of a bad sensor, and if that's the case, you could plug them back in one at a time to see which is shorted or just replace both and be good to go for another 60k.
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Unread 08-14-2014, 02:37 AM   #7
JeepinInJackson
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I like Chris' idea of unplugging o2 sensors to test it out before buying new ones. Also check your camshaft positioning sensor as seeing how they give ppl a lot of grief in the xjs so I've heard. By the way just because fuel pump is making noise doesn't mean it's putting out proper fuel pressure so I recommend borrowing a fuel pressure gauge if you don't have one and hooking it up to see what it says. Seen a thread a guy posted yesterday or something where his wouldn't crank and his pump wasn't that old and it was making noise but when he replaced it problem was fixed as well as he said it felt more powerful, hope this helps!
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Unread 08-18-2014, 08:14 PM   #8
wilding592
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there is no camshaft sensor. and i unplugged the o2 sensors and it started and ran for about 3 seconds then died while trying to give it gas, then i tried to start it and it keeps popping fuses
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Unread 08-18-2014, 08:33 PM   #9
lzugl
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Mine did this to me a while back on my 90 cherokee.. If its cranking and not starting that should tell you your starter is fine. try to jump it, if it still just cranks that means you're not getting enough spark. Check your plugs along with your cap n rotor.

Mine was cap n rotor. i changed that out and it fired right up..
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Unread 08-18-2014, 09:23 PM   #10
chris87xj
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Something fed by that fuse is shorted out.
Here's what I'm thinking it feeds.
96xj-coil-circuit-30a-mini-fuse.gif  
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Unread 08-20-2014, 11:14 AM   #11
1stockjeep
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Try unplugging the coil and crank it for a bit, the fuse also feeds that so it could be the issue, obviously it won't start tho lol. Pull fuel
Pump relay to prevent fouling plugs and washing cylinders
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Unread 08-25-2014, 01:49 AM   #12
wilding592
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sorry about taking so long to reply iv been out of town for work, finally I fixed my ol jeep. The problem was the distributor cap, once I replaced that everything went fine! thank you everyone!
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Unread 10-26-2014, 04:56 PM   #13
wilding592
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Im back guys... so i had the same problem again this week, [crank but no start and keeps popping that lil 30a fuse, and im really stumped with what it could be, so far iv replaced the the plugs, cap n rotor and the ignition coil and nothings helped. any advise?
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Unread 10-27-2014, 01:28 AM   #14
BagusJeep
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It was not your distributor cap. That was just a coincidence.

if you look at the diagram that circuit goes to the coil, o2 sensors and the back of the generator. Have you checked the wire going out to the generator? Have you tried unplugging it and has this got any effect on the fuses blowing?
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Unread 11-03-2014, 03:13 PM   #15
wilding592
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i unplugged the genny and the fuse is still popping
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