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start up issue

  1. 2004-2006 GTO General Discussion
    Recently bought a Gto with a built ls2 (408 stroker) ls3 heads, Texas speed cam and pistons, fast 102 manifold. It’s got a problem where it sometimes starts fine but most times it starts around 500 rpms then stumbles and dies. It’ll drive perfect until you go up the driveway and it’ll stumble...