Question about 1993 Jeep Wrangler

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I have a 1993 wrangler been having trouble with spark

I have a 1993 wrangler been having trouble starting it i changed the cps an the the cam sensor then it worked for a hour or so an died changed the cam sensor agin an it started right up then died an woulndt start agin now we started to check the wiring harness an found 3 wires melted throughout the harness 1 of the wires was from the ignition an 1 was from the lights an the last one was a ground wire melted in spots other 2 melted badly now i should tell you this was a swap from a 2.5 to a 4.0 we used both of the wiring harness under the hood an the dash now we have changed out the 2 wires with new ones an taped up the ground. started right up an ran fine for hours all night long then just when thought all was good my problem of NO SPARIK struck agin. i was coming down a hill when all of the sudden it just shut off an wouldn't start checked for spank an had none now ive changed the coil an cam sensor etc all execpt the distributer before this last run im not sure yet if wires are melted agin but what would make this happen [wires to melt] ?? if the new wires turn out ok an not the problem what would cause this failure of spark and or equipment failure is this common???? plz an ty for any help

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It sounds like you may have a bad crank positioning scensor or could possibly be in the ecm try the wires first then i would go from there

Posted on May 14, 2009


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1993 wrangler won't start

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Jul 10, 2013 | 1993 Jeep Wrangler

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I have a 93 Jeep Wrangler 4.0 that cranks and doesn't wanna start. Fuel Pump is working and has good fuel pressure. Problem is coil loses power after the first start. I put in new distributor, new coil,... mentioned that there is no spark coming from the coil when it's in no start...Is there power from the alternator going to the coil?
One other item...If the timing chain is worn and stretched, it is possible that the cam sensor and crank sensor are out of phase with each other, just enough where a temperature difference will change starting ability.
One question...while in no start, have you tried changing the throttle position while cranking to see if it lights at part or 3/4 throttle?

Oct 15, 2009 | 1993 Jeep Wrangler

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I'm getting no spark from ignition coil. I replaced the coil and still no spark. 1990 jeep wrangler 4 cyl

does the coil have power?? if so, I would highly suspect the crank position sensor. its located back behind the engine drivers side, in the bell housing. its just a guess....... you are there, and I am here. Dont replace anymore parts till you know what is bad, I dont want you spending money on parts you dont need. you will need a wiring diagram, scanner and a service manual to properly diagnose this. a speed sensor or cam sensor could be shorted. take a voltage reading at the crank sensor ORANGE WIRE should be approx 5V if its not 5V disconnect the speed sensor ck again.. if its not 5V disconnect the cam sensor. when all these are disonnected you should have 5v if you do, then take a reading with them all hooked up should still be 5V. the thing I am trying to test is if one of these 3 sensors is shorted. by process of elimination one may be. good luck.

Sep 25, 2009 | 1990 Jeep Wrangler

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My 1993 jeep wont start it cranks over . There

Most likely crank angle sensor if no spark at all, or a coil problem if very weak spark.

Aug 13, 2009 | 1992 Jeep Wrangler

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Changed the crank sensor on my '89 Wagoneer and then discovered my air filter was really, really dirty. Would fouled air filter produce same problems as faulty crank sensor?

If extremely dirty, filter could restrict air flow and eventually produce a no start or low power condition. cps generally gives a shutdown for no obvious reason and no spark when starting.(sometimes re starting after cool down)

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93 wrangler no spark

I'm certain that there is an "official" test for this sensor. I generally quick check by attaching a volt meter set to millivolts to the sensor leads and check for a pulse voltage when cranking. If in doubt and you don't want to spend big$ on the part, you can get an entire distributor at a scrap yard likely for half of the price of the new sensor.

Jun 11, 2009 | 1993 Jeep Wrangler

1 Answer

Jeep wrangelr Crank Position Sensor

wall5552: there were two engines used in 1992 Jeep Wranglers.
A 2.5 liter and a 4.0 liter. HOWEVER>>>> The location for the crank angle sensor is the same for both.
It is located on the bell housing up near the front at about the 10:00 PM position.
The Cam position sensor is located in the Distributor on both engines as well.

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1993 wrangler starting problems

You have to find out if it has fuel and spark . One or the other is missing at the demise of the engine.

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Go to a library that has a set of the factory service manuals (not Chlton's or Haynes or Motor's). The FSM's will give you all the trouble hotting charts that the dealer techs use.

Feb 01, 2009 | 2007 GMC Sierra 1500

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