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Temperature gauge doesn't work since I changed the coolant temperature sensor. on 1995 Saturn SL

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Car would idle rough when cold. Changed PCV and MAP, then put in coolant temp sensor. Car runs fine, but temp gauge doesn't work now. Took off and turned 180* and sprayed with carb cleaner thinking it may have a coat of anti freeze on it. Do I need a bigger hammer? Thanks for the advice!
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