1997 5.7 Hissing Sound At Throttle Body

Discussion in 'Chevy Truck Forum' started by 97 chevy, Dec 5, 2018.

  1. 97 chevy

    97 chevy New Member

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    I have a 1997 2 wheel drive 5.7. I removed the engine and had it rebuilt. Reinstalled engine and had the timing set by a mechanic with a scanner. When it cranks it runs good for about 2 minutes and then starts running rough and sucking air hard at the throttle body. Was showing code 1345. any help??
     
  2. dirtrider73068

    dirtrider73068 Senior Moderator
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    Vacuum leak, can use something like carb cleaner spray it around when you find the leak the rpms will change or it will shut off.
     
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