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Message: <blockquote data-quote="ORVietVet" data-source="post: 23914" data-attributes="member: 9438">This means the ECM inputs are sensing too rich on fuel and is trying to slow down fuel delivery.Is this happening with the sensor plugged back in? You said the connection was good but did not say if you plugged back in. If this fuel trim problem happens with sensor plugged in and if does not happen with sensor unplugged, then I say the sensor is suspect. Sounds like O2's are doing their job.The coolant temp sensor is the choke for fuel injection system.Talk tomorrow.</blockquote>