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Temperature gauge is going up and down. Rpms are up and down

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Old Apr 6, 2018 | 08:36 PM
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Chuck Bailey's Avatar
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Default Temperature gauge is going up and down. Rpms are up and down

My 06 temperature gauge is going up and down and the rpms are as well. Any advice on what I should check?
 
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Old Apr 7, 2018 | 04:01 PM
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mt6127's Avatar
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I'd start by replacing the engine coolant temp sensor and thermostat. $75 in parts
 
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