I have a 2011 GT, I installed a Boss Mani & a 90mm BBK TB on it. Ever since I did the install I've been having trouble with the RPM's hanging between shifts & pulsating at idle then the idle levels out & is fine. I have also been working with the company that tuned it for me but we're not making any progress. I want to calibrate the TB but I don't know what the voltage should be & not sure what color wires I should tap into to check it.. Anyone know?

 

should have gotten values prior to swapping TB. go back to the stock TB. the aftermarket ones are trouble IMHO.

 

TPS sensors are not really adjustable like they were in the old days. At start-up, the PCM automatically calibrates the lowest closed throttle value figuratively as "0". The problem is probably 1. the throttle body, and/or, 2. the tune.

 

Thanks for the info guys. It looks like I'll have to keep working with the tune company.