C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old Sep 6, 2016 | 03:08 PM
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Under the intake there is a vacuum thing with tow lines on one side and a single line on the other side. the single line was not there. where does it go? 1990 350 l98 thanks bob
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Old Sep 6, 2016 | 03:55 PM
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Originally Posted by mphy98
Under the intake there is a vacuum thing with tow lines on one side and a single line on the other side. the single line was not there. where does it go? 1990 350 l98 thanks bob
the vacuum thing is the egr solenoid. under the hood, there should be a vacuum hose routing diagram.


Last edited by Joe C; Sep 6, 2016 at 04:00 PM.
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Old Sep 7, 2016 | 12:07 AM
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You might be looking at the vent and thinking something must go there. It lets air in when the vacuum to the EGR valve is released. There should be a foam rubber filter there, but they frequently crumble and disappear. Mine's still intact:

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