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May have other outlying problems with other electrical/computer regulated parts. Check you distributor and/or control module- should be in the distributor I believe. Check for breaks in wiring and connections. Worst case a defective coil though rare but possible. Test components by measuring the ohms/volts with a multimeter, need to get specifications though. Check repair manuals or other databases for info on that.

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Q: How come your 91 jeep Cherokee wont spark when you put a new coil in?
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