by arky710 on February 27th, 2007

arky710

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1994 mercury tracer runs rough after engine warms up. What could cause this?

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  • by Darryl61 on February 27th, 2007

    Darryl61

    Likely one of the 2 sensors that control fuel delivery based on temperature. Intake air temp. sensor, or coolant temp. sensor. Would be worthwhile to have the car checked for error codes first. May save a lot of guesswork.

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