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Im guessing you have already checked the plugs. Make sure there is power and a signal to the coil. Bad crank position sensor can make the coil not fire. I found the the answer to my own question! Timing belt broke.

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โˆ™ 2006-04-27 05:15:48
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Q: What could be wrong with a 1990 Geo Prizm if the coils are new but there is no spark?
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