Diagnosing fault vacuum pump or leaking reservoir?
#1
06-05-2010, 04:00 PM
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Diagnosing fault vacuum pump or leaking reservoir?
From the facts section:
Problem: Air flow has defaulted to the defrost vents (either all the time or under acceleration).
Solution: The system is designed to default to the defroster in the event airflow control is lost. Intake manifold vacuum is supplied to the control head, whether manual or automatic (electronic) to operate the vacuum motors.. A very common failure is a split, cracked, or otherwise leaking vacuum line located between the battery and firewall. Other causes include a leaking vacuum reservoir (inside the right front fender), faulty check-valve inside the dash, or other vacuum leak in the system.
I have this problem on my 2006 F250 6.0 PSD. Air defaulted to defrost only and 4x4 non-op. How do I check the vacuum motor? Or reservoir for that matter?
Problem: Air flow has defaulted to the defrost vents (either all the time or under acceleration).
Solution: The system is designed to default to the defroster in the event airflow control is lost. Intake manifold vacuum is supplied to the control head, whether manual or automatic (electronic) to operate the vacuum motors.. A very common failure is a split, cracked, or otherwise leaking vacuum line located between the battery and firewall. Other causes include a leaking vacuum reservoir (inside the right front fender), faulty check-valve inside the dash, or other vacuum leak in the system.
I have this problem on my 2006 F250 6.0 PSD. Air defaulted to defrost only and 4x4 non-op. How do I check the vacuum motor? Or reservoir for that matter?
#2
06-06-2010, 07:33 AM
Hotshot
#3
06-07-2010, 01:18 AM
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