Can someone identify this from my intake manifold?
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Vortec 6.0 / 6.2 Liter Discussion, Can someone identify this from my intake manifold? in Cadillac Engine Technical Discussion; I've recently got codes P0171 and P0174 which suggests my truck is running lean. The first thing I checked is ...
  1. #1
    drrxnupe is offline Cadillac Owners Member
    Automobile(s): Escalade EXT
    Join Date
    Jun 2010
    Posts
    7

    Can someone identify this from my intake manifold?

    I've recently got codes P0171 and P0174 which suggests my truck is running lean. The first thing I checked is for unsealed vacuum lines into the intake manifold because I thought I was hearing suction. I finally narrowed it down to something that appears broken. With the engine running, I covered the hole with my finger and my truck instantly started idling more smoothly. See the pics below.

    What the heck is this and how do I fix it? Please excuse typos as I am posting from my iPhone.






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  3. #2
    01ssreda4 is offline Cadillac Owners Fanatic
    Automobile(s): 99 STS VIN 9
    Join Date
    Nov 2011
    Posts
    127

    Re: Can someone identify this from my intake manifold?

    Thats some type of vacuum port that broke

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