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rough idle

  1. Drivetrain & Performance
    Having a real tough time with my 71 Nova and need some help. Have a rattle coming from both back cylinders and wont run like it used to, smooth and fast. Now it acts off balance and rattles like its off timing or missing, but not. When I floor it the engine doesn't backfire through carb but just...
  2. Drivetrain & Performance
    I just purchase my 67 Nova with a 406 sbc. Some basics on the car are 750 QFT Carb, MSD Ignition system, Edelbrock Vortex Air Gap Manifold, Edelbrock E-tec 170 Aluminum heads, hooker competition headers, 5 spd Tremec TKO 600, 1973 4-Bolt main block, with forged pistons and a competition cam...