Forum Discussion
PaulJ2
Jan 21, 2014Explorer
Replaced IAC valve three times, so probably not that. Next would be the throttle position sensor if you haven't already. And yes check all grounds and connections to the ECM.
Coolant temperature sensor bad or faulty thermostat not keeping coolant at 190 or so will cause bad fuel milage.
Coolant temperature sensor bad or faulty thermostat not keeping coolant at 190 or so will cause bad fuel milage.
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