Question about 1990 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

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As I did find this quite helpful you should be ready for a bit of frustration when trying to acsess the CPS, be shure you are equiped with ample extentions as well as jack stand's and a second pair of hands never hurts.

Posted on Mar 22, 2010

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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.

Posted on Sep 25, 2009


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