EGR delete cause 4x4 issues???? - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 11-04-2013, 09:10 AM Thread Starter
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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???

2005 Dark Blue F-250 Harley Davidson 4x4. SCT Livewire TS, 4" Silverline TBE, Sinister intake elbow, Riff Raff turbo boots, Blue spring, 6.4 banjo bolts, Sinister coolant filter, Fleetguard OAT, IPR EGR delete, ARP studs.

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post #2 of 3 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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post #3 of 3 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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