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Ford Explorer Community - Maintenance - Modifications - Performance Upgrades - Problem Solving - Off-Road - Street
Explorer Forum Covers the Explorer ST, Explorer Sport, Explorer Sport Trac, Lincoln Aviator, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Ford Aerostar
Did not know if this was the right place to post it but my A/C fades out when I hit the gas and the trans down shifts into overdrive. The truck is a 4x4 and the motor is a 4.0L. Anyone have any suggestions or experience the same thing? Does it just need a charge or is it a vacuum leak?
Did not know if this was the right place to post it but my A/C fades out when I hit the gas and the trans down shifts into overdrive. The truck is a 4x4 and the motor is a 4.0L. Anyone have any suggestions or experience the same thing? Does it just need a charge or is it a vacuum leak?
When it happens, check to see if the airflow is being incorrectly redirected to the defroster vents. That is a sign that the HVAC system vacuum is dropping when the engine vacuum drops. Look for a melted or otherwise damaged plastic vacuum line on the passenger side of the engine bay. Other possibilites are a cracked vacuum reservoir under the air filter box or vacuum line problems under the dash.
As noted above, the A/C compressor will be completely disabled by the PCM at or near wide open throttle. That is normal.
