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Old 12-13-2017, 04:16 PM   #5
kenman1717
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Re: vacuum hose goes nowhere 2003 s10 xtreme

Quote:
Originally Posted by brcidd View Post
The hose plugs into the vacuum reservoir there should be a check valve inline and tees into the conduit that goes under the dash and drives the mode doors for your HVAC system. Can you change the mode inside (air delivery) from floor to vent to defrost okay? If not, your vacuum is not available. If hose is just sucking air, that is bad, in that you create a vacuum leak into your intake which make you run leaner.
The mode doors do switch fine. I might just plug that line off, I don't have that ball hanging off the hood. As for running lean, this truck has exhaust manifold leaks, and no cats, as well as who ever removed them hung the o2 sensors above the frame rails so they aren't even in the exhaust pipes. Truck has over 200 000kms on it as well as various oil leaks and stuff, not really looking to spend money, it sits most of time.
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