New injectors causing problems

Discussion in 'GM Duramax 6.6 (LB7)' started by Michaeljoeb, Jan 2, 2012.

  1. Michaeljoeb

    Michaeljoeb New Member

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    New injectors in my 2001 Duramax seem to be causing a code 89 reading when "check engine soon"light comes on intermittently. This started as soon as I took it out of the dealers shop. Tried changing switch as per GM bulletin but still no change. Dirt in the system? Sensor problem? Regulator problem?
     

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