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OEM NPP lines?

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Old Dec 12, 2021 | 11:56 AM
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Default Factory NPP lines?

Factory NPP lines? Someone removed the mufflers before I bought. Hoping I won’t need to buy the kit and I could use the original stuff installed from factory.



Last edited by wood78221; Dec 12, 2021 at 12:53 PM.
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Old Dec 12, 2021 | 01:20 PM
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Yes. Somewhere the line has to have a plug in it otherwise you would have a vacuum leak.
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Old Dec 16, 2021 | 01:12 AM
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I would hook a vacuum gauge to it and make sure the NPP fuse is in place. Then if you have vacuum you are good to go, if not vacuum is taken off the back of intake manifold.
Vacuum might be plugged off there.
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Old Dec 16, 2021 | 10:05 AM
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Default Npp

Originally Posted by HK770
I would hook a vacuum gauge to it and make sure the NPP fuse is in place. Then if you have vacuum you are good to go, if not vacuum is taken off the back of intake manifold.
Vacuum might be plugged off there.
. Or you could just hold your finger over the end of the line with the car running and feel if it sucks. You would also need to T or Y off of that line to connect the other LH Valve.
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Old Dec 16, 2021 | 10:17 AM
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Thanks for the good insight. I am having them installed tomorrow and will check all these things are they are in place.
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Old Dec 16, 2021 | 10:18 AM
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Originally Posted by 2008 Corvette
. Or you could just hold your finger over the end of the line with the car running and feel if it sucks. You would also need to T or Y off of that line to connect the other LH Valve.
So if it is sucking, where can I get the T or Y?
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Old Dec 16, 2021 | 12:26 PM
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Any auto parts store.
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