I have a 90 camaro rs with a 305 fuel injected and it has a throttle body. My problem is it idles high in park and in neutral. i have already changed the IAC valve and the TPS and it has no vacumm leaks any one know what else it could be? Thanks. Also does anyone know if a steering column from an 89 would work for my 90?

 

Besides putting your thread in the right place, you might want to check this out. And while you're at it read a lot of the stuff in the technical articles section. That's where this is found
https://www.thirdgen.org/tpimod2