Last month we fielded a question about a fault code a reader had been trying to repair for more than a year. To recap, the Corvette in question, a ’96 model, had a recurring P0171 code, or “System Too ...

'Somewhere in automotive never-never land, there's a place called TPI Gulch. Walk to the edge, look down, and you'll see heaps of brand-new throttle-position sensors, mass airflow meters, ...

Since the inception of GMHTP's LS1 project car, we've cut a full second off its ET (13.36 to 12.36), added 6 mph (103 to 109) to the trap speed, and added 55 horses and 48-foot pounds to the wheels.