Is this a cracked intake plenum? (see attached pics) - Page 2
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Northstar Engines and System Technical Discussion Discussion, Is this a cracked intake plenum? (see attached pics) in Cadillac Engine Technical Discussion; Originally Posted by gbrown2934 I am having some idle issues when cold, had 2 codes po171 and po174, bank 1 ...
  1. #16
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
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    Re: Is this a cracked intake plenum? (see attached pics)

    Quote Originally Posted by gbrown2934 View Post
    I am having some idle issues when cold, had 2 codes po171 and po174, bank 1 lean bank 2 lean, I was told it was the plenum, or is it just the coupler, I am a little confused,thanks
    Post #13, last sentence - or click my username, open the profile. left column, lower part. 2 albums, 6 pages of parts and service pictures and diagrams for the 2000 and later Northstar and cars.

  2. #17
    gbrown2934 is offline Cadillac Owners Member
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    Re: Is this a cracked intake plenum? (see attached pics)

    Thanks for the info, found the rubber plenum with a big crack. Had a friend replace it for me, I read a few of the replacment procedures, my friend didnt have to remove the fuek rail save some time. Thanks again for the help.

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