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Another TBI question

Discussion in 'The Injection Section' started by HammaK5, Jan 5, 2007.

  1. HammaK5

    HammaK5 Registered Member

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    Ok here goes 87 R30 454N TBI. Engine just rebuilt when I drive it now from no throttle up to 1/4 throttle engine stumbles almost like a lean condition and a cold engine. I checked the connections and grounds any help would be greatly appreciated.
     
  2. southernspeed

    southernspeed 1/2 ton status GMOTM Winner

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    You could try resetting base idle which would set the IAC also. Do you have winaldl? Check for vacuum leaks, check your timing is correct (usually0* on tbi but I'm not sure about 454s), make sure your manifold is tightened down (they tend to back off a bit). Are you sure you set your valve lash correctly? lots to check!!
     

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