1g throttle body upgrade issues

[mayomoto]

Car was running and idling fine with the 2g tb. But is was leaking during a blt. So I decided to upgrade to the 1g tb. I got a rebuilt 1g from a member. I am getting a high idle from 1500 to 2000 rpms. This is with the throttle cable disconnected and new gaskets and the biss screw all the way in. I have switched back to the 2g just to see and it runs correctly. Also I followed instruction from the rre website. Any help would be appreciated.

 

[nastynine]

make sure your throttle cable isn't too short and causing it to open a little making it idle higher then it should.. i had the same problem and could never figure it out. i just learned to deal with it

 

[SpeedTech720]

Check the closed throttle position switch on the firewall side of the TB. If its turned in to far the throttle plate will not close all the way. Also check the vacuum ports and shaft seals (boost leak check).

 

[Brandon1ggsx]

How bad was the 2g throttle body leaking, also have you check to see if the throttle blade on the 1g throttle body might have been installed upside down, ask because the edge of the blade is angled slightly and if up side down it might not be sealing properly.

 

[TSi Kid]

Sounds like your TPS isn't set properly.

 

[92awddsm]

The tps isnt going too cause a high idle problem. As already stated, either the closed throttle switch isnt adjusted properly or the throttle blade was reinstalled backwards or off center.

 

[SpeedTech720]

my car would surge during idle because of that switch. acted like a giant vac leak.