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Old 03-30-2006, 07:55 PM   #1 (permalink)
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Help! jeep wont start!

ok so this weekened I was up in the snow nothing crazy but i stalled my jeep and when I went to start it back up it was barely and i mean barely running so I imediatly shut it down and when i tried to start it back up it would roll over but not fire.
now what i have tried:
1.Pulled a plug and wire and rested them up aginst the block and no spark.
2.Took it to the shop they said it was throwing a crank postition sensor code so i replaced that with no luck.
3.Plugged the wiring harness into a different computer and still no luck.

Things that have been replaced in the last year or so:
1.Fuel pump, plus i can hear it come on.
2.Coil, cap and rotor, plugs and wires.
3.Throttle possition censor.
4.Coolant temp. censor.

If any one has any ideas please let me know other wise if anyone knows of any good shops in the concord area that are actually some what trust worthy.
Thanks for the help.
Chase
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Its a 93 yj with a 6cyl 4.0 and a 5speed.
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Old 03-31-2006, 08:03 AM   #2 (permalink)
 
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I had a similar problem with my '94 XJ with a 4.0. No spark, no start. It turned out to be an ignition relay.

I went through the whole CPS, computer, plugs, wires, etc routine myself and it turned out to be a $15 relay so I'd check the relays. Good luck.
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Old 03-31-2006, 08:17 AM   #3 (permalink)
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does it still turn over? if so it might be the coil i had the same problem. just a thought
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Old 03-31-2006, 10:36 AM   #4 (permalink)
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I say check the coil for resistance. Check your Haynes manual for the correct resistance.

Is the coil and the leads on the cap corroded? I had no spark a while back, but fixed it with a new ECU.

Get a multimeter and check the voltage coming into the coil. One wire should be a constant reading of 12 or 14 volts, and the other wire should be a pulse reading. If you're getting voltage, then it's obviously a problem at or after the coil; if not then it's before the coil.
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Old 03-31-2006, 06:53 PM   #5 (permalink)
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Thanks for the input:

themophead: I havent thought of that ill give it a try.

getstucksome: Its does still turn over its got a newer coil and the old one was never bad I tried putting that one back on with no luck.

wiggamoe: Like i said its newer but I guess you never know ill try testing it.
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Old 04-01-2006, 09:06 AM   #6 (permalink)
 
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Ignition Control Module
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Old 04-02-2006, 06:54 AM   #7 (permalink)
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Did you replace the ICM?
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Old 04-02-2006, 11:12 AM   #8 (permalink)
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Quote:
Originally Posted by wiggamoe
Did you replace the ICM?
??? You mean PCM?
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Old 04-02-2006, 12:24 PM   #9 (permalink)
 
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Quote:
Originally Posted by Murfman
Ignition Control Module
no. this one. its below the windshield washer tank on the driver side, with a 6 cyl.
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Old 04-02-2006, 05:08 PM   #10 (permalink)
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Yes I tried plugging a new computer or ICM in and that didnt solve the problem.
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Old 04-05-2006, 08:18 AM   #11 (permalink)
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Old 04-05-2006, 07:26 PM   #12 (permalink)
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try the flywheel sensor mine went out no sparkie no fuel. new sensor started right up.
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Old 04-05-2006, 07:39 PM   #13 (permalink)
 
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Cool Short in the wiring

"Took it to the shop they said it was throwing a crank postition sensor code so i replaced that with no luck."

This sensor might of gone bad due to a short in the wiring. double check it. It may have a tear and be making contact with the firewall metal. If so even if the sensor is good its sending a negative message to your CPU. That has happened to several of our Jeeps down here in Mexico.

Good luck and hopefully if just that.

Where does the spark stop?...if any at all
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Old 04-06-2006, 04:33 PM   #14 (permalink)
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Theres no spark at all
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Old 04-06-2006, 04:53 PM   #15 (permalink)
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Disconnect the battery, Pull the ignition relay out (next to the battery) clean the connectors, reconnect the battery and see if that works.
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