vacuum pump?
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Elder User
Joined: Mar 2012
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vacuum pump?
Does a 2001 7.3 SD have a vacuum pump? If so, what is its' duty cycle?
I have a weird noise when I turn the key to the run no start position (sounds like a pump) which ends a few seconds later with a rattle. The unit this noise is coming from is on the passenger side fender under the hood, just in front of the blower motor. It doesn't sound healthy.
I have a weird noise when I turn the key to the run no start position (sounds like a pump) which ends a few seconds later with a rattle. The unit this noise is coming from is on the passenger side fender under the hood, just in front of the blower motor. It doesn't sound healthy.
Junior User
Joined: Jan 2010
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How extensive would it be to replace all the vacuum lines on a sd?? I've got one hanging that used to operate my hubs, my blower is slow to react and sometimes I'll get straight hot air out oft ac then cold conditioned air... Kinda makes me think there is a leak or broken line... Any ideas???? I don't want to just throw a part at it when the one there is working its just not hooked up completely
Post Fiend
Joined: Nov 2007
Posts: 9,549
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From: Payson, AZ
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Junior User
Joined: Jan 2010
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Thanks, anyone got a diagram for where it all goes and how it's routed? If not, I'll do my best to trace it
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Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
HVAC Vacum Diagram "Manual Operation":
As far as hot and cold running A/C you may need to adjust the A/C cluch air gap. Springerpop's A/C Clutch Air Gap Adjustment
Hotshot
Joined: Jan 2011
Posts: 18,849
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From: Puget Sound
My leaks:
- PVHS (or ESOF module) leaked - new one for about $75 at the stealership.
- Cracked vac lines on the connector behind the wheel (turn the wheel to get at it without removing or jacking anything). I cut about 1 1/2 inches off the end of the vac tubing to the hub. Re-install freshly-trimmed end and have a celebratory beverage.
