Vacuum Leak

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Oct 14, 2012 | 10:37 PM

Roasted7

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Vacuum Leak

My heater only blows out of the defrost so I think I may have a vacuum leak. I can't see anything immediately obvious.

Does anyone know where I might find a vacuum diagram?

Thanks.

Oct 14, 2012 | 10:42 PM

BLADE35

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From: Saratoga Springs,UT

Does the Vac pump run??

Oct 14, 2012 | 10:43 PM

m-chan68

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From: Woodbridge, Ontario, CA

Does your vacuum pump work? If not, check for power and ground to the vacuum pump connector with the key in the RUN position. If you are getting power and ground at the connector but the pump is not running, replace the pump and recheck.

Oct 15, 2012 | 07:46 AM

Roasted7

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The pump is definitely running. I just had all new injectors installed so something must have happened when they put everything back together. Doesn't seem like they would have had to mess with any vacuum lines.

Oct 15, 2012 | 08:42 AM

69cj

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From: Middle Tn.

Quote:

Originally Posted by Roasted7

Heater diverter valve in the water hose passenger side. Check that the grey vacum line is hooked up.

Oct 21, 2012 | 06:04 PM

Roasted7

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I found that if I pull the vac line off the control valve for the auto hubs and plug that line then the pump will build vacuum and hold it very well.

That control valve must be bad.