Question about 1991 Jeep Wrangler

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1991 jeep wrangler cranks but wont start

I am not getting any spark at the dist.cap.
I have replaced the the coil, crank position sensor ,dist cap and module....
could it be anything else besides a bad ECM???

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  • Gart31 May 24, 2008

    yes I tested all the fuses with a volt meter

  • Gart31 May 25, 2008

    Leads seam to be OK

  • Gart31 May 30, 2008

    timing belt is good

  • Gart31 Jun 03, 2008

    Problem solved!!! After taking the jeep to the shop.
    We discovered that there was water in the bottom of the fuse box. It was shorting out before it got to the fuse box. After drying it out it started right up....
    Thanks for all the help though.....

  • Anonymous Jul 09, 2008

    Wrangler cranks but wont start, new roter, testet the coil, not getting fire to the coil, it only has 244,857 miles on it.

  • shane donegan
    shane donegan May 11, 2010

    have u checked the fuses under the hood?

  • Anonymous Mar 18, 2014

    Have replaced dist cap and module in dist. Replaced coil. Replaced ECM Still does it. Radiator is not getting hot. But if outside temp gets above 70 it will run fine and then just randomly die. Will turn over but not start until it sits for about 30 minutes.

  • Anonymous Mar 28, 2014

    no spark crank sencor gets 5volts on2 of 3wires changed ecm 4times with remanufactures



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I have tested the fuse's under the hood, the jeep was in the garage with a soft top on it no rain inside of it that I have found, fuse box is dry.

Posted on Jul 10, 2008

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  • 359 Answers

Just a suggestion hows your leads?

Posted on May 24, 2008

  • shane donegan
    shane donegan May 25, 2008

    has the timing belt slipped or snapped? timing out?

  • shane donegan
    shane donegan Jun 02, 2008

    sorry have your ECM tested?



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1 Answer

Why wont it start

Yes, it could be. The crank sensor is responsible for a lot of jeeps not getting spark. First check if the green/black wire to the coil has voltage with key on. That is the primary current to coil. If voltage there, it could be the crank sensor. If no voltage to coil with key on, then problem is that computer is not sending power to the coil. That will have to be checked-there is a relay involved-the Automatic Shut Down relay in the under hood fuse-relay box.

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Did you replace the coil because it wouldn't start before? If it ran before, there must be a mis-connection somewhere. I assume by your stating that 'it turns but will not crank', to mean that the engine will crank over with the starter but won't start and run. True?

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Take the distributor cap have someone crank the car and look if rotor turns, look at rotor conditions, I am sure that you have replaced it, hot wire from positive on the battery to positive on the coil, if car starts after you have a problem on the key, Is it fuel getting to the injectors? after You replaced so many things,if your rotor is not turning when You crank the engine, your timing chain must be defective or timing gear,

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