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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

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Old Feb 19, 2009 | 11:22 PM
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What does the hose on the passenger side of the throttle body do? It runs from the tb to the valve cover.
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Old Feb 20, 2009 | 12:07 AM
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Originally Posted by hitmanws6
What does the hose on the drivers side of the throttle body do? It runs from the tb to the valve cover.
It's on the passenger side. It goes from the passenger side of the TB to the passenger side valve cover. It's an oil vapor vent tube IIRC.
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Old Feb 20, 2009 | 12:12 AM
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if its obstructed will it cause a choppy idle and startup?
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Old Feb 20, 2009 | 12:32 AM
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its just a fresh air hose for the pcv system. some people will cap the port and just run a breather so i doubt that will cause an idle problem
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Old Feb 20, 2009 | 01:01 AM
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if the hose is beat up can cause a vacuum leak
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Old Feb 20, 2009 | 01:52 AM
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i found out the name. its the CCV hose. it explains my problems. 3 bucks and a trip to kragen will fix the problem
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Old Feb 20, 2009 | 05:15 AM
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The hose uses intake vacuum to pull out crankcase gases from the crankcase and reintroduce them for combustion.
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Old Feb 20, 2009 | 01:31 PM
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just replaced it. works great now
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