5.2 wont start - JeepForum.com
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post #1 of 19 Old 12-01-2012, 04:16 PM Thread Starter
KyleD31
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5.2 wont start

My 93 5.2 won't start. It has a ****ty battery. But even when jump started its doesn't. It cranks fine and its getting a spark. I can hear the fuel pump work. Even with starting fluid in the throttle body it doesn't start. I need help

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post #2 of 19 Old 12-01-2012, 11:23 PM Thread Starter
KyleD31
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Could it be the crank positioning sensor? I don't really know what that is but I see the term thrown around a lot
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post #3 of 19 Old 12-02-2012, 12:25 AM
Roskoe
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Any CEL ?

"aut viam inveniam aut faciam"

I hate when old people poke me at weddings, point and whisper, "You're next." So I've started doing the same thing to them at funerals
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post #4 of 19 Old 12-02-2012, 07:33 AM Thread Starter
KyleD31
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Quote:
Originally Posted by Roskoe
Any CEL ?
No. The only code I got was recently disconnected battery
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post #5 of 19 Old 12-02-2012, 08:12 AM
steveV8GC
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Quote:
Originally Posted by KyleD31 View Post
My 93 5.2 won't start. It has a ****ty battery. But even when jump started its doesn't. It cranks fine and its getting a spark. I can hear the fuel pump work. Even with starting fluid in the throttle body it doesn't start. I need help
It could be the immobilizer has switched on.... remote lock it, then unlock and try again.
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post #6 of 19 Old 12-02-2012, 09:42 AM Thread Starter
KyleD31
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Quote:
Originally Posted by steveV8GC

It could be the immobilizer has switched on.... remote lock it, then unlock and try again.
I've done that. Still doesn't work.
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post #7 of 19 Old 12-02-2012, 10:32 AM
Natej_85
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If you have spark i don't think it would be your crank position sensor.

Edit. Have you checked your cam position sensor?
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post #8 of 19 Old 12-02-2012, 10:38 AM Thread Starter
KyleD31
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Quote:
Originally Posted by Natej_85
If you have spark i don't think it would be your crank position sensor.

Edit. Have you checked your cam position sensor?
No. Idk how or what that is
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post #9 of 19 Old 12-02-2012, 10:39 AM Thread Starter
KyleD31
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Quote:
Originally Posted by KyleD31

No. Idk how or what that is
Edit: I've heard of it but that's the extent of my knowledge. How do I check it and what does it do?
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post #10 of 19 Old 12-02-2012, 10:49 AM
Natej_85
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What year 5.2 you have? Im checking in my haynes for the procedure
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post #11 of 19 Old 12-02-2012, 10:56 AM Thread Starter
KyleD31
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Quote:
Originally Posted by natej_85
what year 5.2 you have? Im checking in my haynes for the procedure
93
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post #12 of 19 Old 12-02-2012, 11:17 AM
Natej_85
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The cam position sensor is located inside your distributor with a plug in harness coming out. You'll want to disconnect your coil electrical connector, and remove your fuel pump relay from your pdc. Unplug the connector and you'll want to test the signal from your pcm first. Connect the positive lead of the voltmeter to the white/black wire terminal and the negative to the black/light blue wire terminal of the connector. Then turn the key on, the voltage should read approx. 8.0 volts for a pre- 95. If its not you'll want to check your wiring from the connector to the pcm. If it reads ok then check the cam pos sensor by reconnecting it and backprobing the gray/black wire terminal of the cam pos sensor with the positive probe and put the negative on a good engine ground point. Then have someone crank yhe engine over, the voltage should fluctuate from around 5.0 volts to 0.0. Any other reading and its time to replace it.
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post #13 of 19 Old 12-02-2012, 11:21 AM Thread Starter
KyleD31
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Thanks. I'll try it when I get a chance!
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post #14 of 19 Old 12-04-2012, 10:56 AM Thread Starter
KyleD31
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I think it's my distributor. I'm getting spark from my coil but almost none In the plugs
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post #15 of 19 Old 12-04-2012, 11:05 AM
Natej_85
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Time for a tune-up. Cap rotor plugs and wires.
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