vettenuts

iTrader: (4)

Recently installed a Shaner ported TB. Car starts and runs very good, but when cold it starts at 2,300 RPM and then drops back. The throttle blade seems to be open more than the stock unit I took off. Is there an adjustment for initial blade position on the Corvette TB since the motor controls idle and there is no IAC? Or, should the PCM learn that a new throttle blade position is required for cold start?