Question about 2000 Jeep Cherokee

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I replaced ignition coil in to new for jeep grand cherokee 1999 4.0i limited and engine not whant to start up but then i put back old one it starts and works just one cylinder not working.any ideas?

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  • stiklineakis Mar 18, 2011

    oh well i passed that coil pack to test for car electrition and if it not working the shop will send it back to jeep centre thanks for help prostreet 55. i found some info how to check if coil pack is working here you if it is right info

    Put on your safety glasses and open the hood. Disconnect the negative cable from the battery and place it out of the way so that it will not make contact with the battery terminal while you work.

    Locate the coil pack. The coil pack is a long black unit, bolted directly on the cylinder head on the left side of the engine. The coil pack attaches directly to the spark plugs.

    Remove the four coil pack mounting bolts using a ratchet.

    Pry the coil pack away from the engine head. Grasp each end of the coil pack and work it back and forth until you can remove the coil pack boots from the spark plugs.

    Lift the coil pack up slightly until you gain access to the electrical connector on the back side of the unit. Depress the clip on the electrical connector and unplug it from the coil pack. Remove the coil pack.

    Place the coil pack on a flat surface.

    Turn on your ohmmeter and set it to the 20,000 ohms range.

    Touch the ohmmeter leads to the connectors in the first spark plug boot. Your meter should read from 6,000 to 30,000 ohms. Repeat this on each spark plug boots. Replace the coil pack if the measurement falls outside of this range.

    Set the ohmmeter to the 10 ohms range. Touch the center prong on the electrical connector with one of the leads and the first spark plug boot with the other. Your meter should read less than 2 ohms. Repeat this while touching the second lead to each spark plug boot. Replace the coil pack if the measurement is higher than 2 ohms.

    Replace the coil pack with a working coil pack, if necessary. Reinstall it following the removal procedure in reverse

    Read more: How do I Check a Jeep Grand Cherokee Coil Pack? | eHow.com



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Is it a single coil or a coil pack with all plug wires going to it..if its a coil pack its bad and the new one is no good ,that does happen alot more than u might think. i had a brand new MSD box bad from factory. and that was like 200 bucks so you never know. they have tests that u can do on the coil also to c if that is problem let me know if u want to go that way and i can help also

Posted on Mar 17, 2011

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