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Q: Why does my car run Rough? on 1991 Buick Regal

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I replaced two coil packs, it ran ok. One day I was driving and the car shut off. i tried to start it then it back fired. It started up after 5 mins or so. It drove home fine. I was driving it the next morning it was running rough. I thought it was the other coil pack that needed replacement. I did that, but it was the same. I replaced the wires, still the same thing. What do I do now?
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It may be one of your fuses try the e.c.u. fuse and make sure it is still a good fuse and if it not that then check all of your sensors some times they come loose or crack.
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