EGR delete cause 4x4 issues???? - Ford Powerstroke Diesel Forum
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Old 11-04-2013, 09:10 AM
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EGR delete cause 4x4 issues????

My A/C has been going to defrost intermittently when 4x4 is engaged. I just had my EGR deleted and havent uploaded a tune to shut the EGR off. Will this cause my A/C to go to defrost when switched to 4x4???
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Old 11-20-2013, 02:14 PM
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No check the vacuum lines on the 4x4 may have a leak since when 4x4 will open a vacuum solenoid to engage the auto hubs. The default blend door actuator position is defrost when vacuum is lost


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Old 11-20-2013, 02:18 PM
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agree^^^^ Found this out when I did the coolant filter and forgot a single little vacuum line...
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