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Unread 12-01-2012, 05:16 PM   #1
KyleD31
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1993 ZJ 
 
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Location: Chesterfield, MICHIGAN
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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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Unread 12-02-2012, 12:23 AM   #2
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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Unread 12-02-2012, 01:25 AM   #3
Roskoe
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Any CEL ?
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Unread 12-02-2012, 08:33 AM   #4
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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Unread 12-02-2012, 09:12 AM   #5
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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Unread 12-02-2012, 10:42 AM   #6
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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Unread 12-02-2012, 11:32 AM   #7
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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Unread 12-02-2012, 11:38 AM   #8
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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Unread 12-02-2012, 11:39 AM   #9
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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Unread 12-02-2012, 11:49 AM   #10
Natej_85
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What year 5.2 you have? Im checking in my haynes for the procedure
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Unread 12-02-2012, 11:56 AM   #11
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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Unread 12-02-2012, 12:17 PM   #12
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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Unread 12-02-2012, 12:21 PM   #13
KyleD31
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Thanks. I'll try it when I get a chance!
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Unread 12-04-2012, 11:56 AM   #14
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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Unread 12-04-2012, 12:05 PM   #15
Natej_85
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Time for a tune-up. Cap rotor plugs and wires.
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