I regeared my 2007 GT/CS with 373's and down loaded the "street" tune that Bama downloaded on my SF3 tuner....on a cold start the rpm's go to 2000...down to 1500, and then settles down to the normal idle (800)....all in about 6 seconds.....not good for the engine....any idea's?
You might have better luck in the S197 tech section. This tech section is specific to 96-04 4.6 engines. Few of us are familiar with the 05+ 3V engines. Best regards.