Hi I'm new to the Corvette world and I was wondering if you get better milage in valet mode rather than full power mode?
The intent of the "Valet" mode was actually to allow the engine to operate on eight injectors whilst on the emission test cycle. The primary lobe of the LT5 intake cam is 20 deg shorter in duration than the secondary lobe. On a 90 MY car the power key could be left in the full power mode at all times, unfortunately for the 91 MY and above we were forced to adopt a strategy whereby the system would be in "Normal" mode(8 injectors) at every start. Hence the change in the key system for the later cars, this strategy prevented the power key from being considered an emission defeat device.