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  1. Bigdog67

    Random miss is killing me. F/S Blazer 5.7 tbi

    For the most part I’ve always had a random misfire. Recently it got extremely worse. From a dead stop or rolling if I hit the gas she would bog down as if she had no pow. Put a new 02 sensor in and it helped pulled egr, again it helped. Ran a scan on it and I noticed she had 14 degrees of timing...
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