IAC calibration
Pro
Joined: Jul 2023
Posts: 537
Likes: 279
From: Marysville WA
Yes there is a procedure but it is very easy. Here is my experience from last month. Post #5 shows the steps to take. BTW this is for a CFI '84.
https://www.corvetteforum.com/forums...-stalling.html
Since then I have had the symptoms reappear, so I'm going to replace the fuel filter and check for vacuum leaks. I have already discovered that the Thermac door on the drivers side intake do not close with a cold start. That means either a vacuum issue or the vacuum diaphragm motor is bad. I'll update my orginal thread as I make (or not make) progress.
https://www.corvetteforum.com/forums...-stalling.html
Since then I have had the symptoms reappear, so I'm going to replace the fuel filter and check for vacuum leaks. I have already discovered that the Thermac door on the drivers side intake do not close with a cold start. That means either a vacuum issue or the vacuum diaphragm motor is bad. I'll update my orginal thread as I make (or not make) progress.
Last edited by typical boomer; Jun 10, 2024 at 10:47 PM.
Melting Slicks
Joined: Aug 2003
Posts: 3,399
Likes: 394
From: Lakeville MI
At the end of every ignition cycle, the IAC will be reset by moving fully open, fully closed and then opening again to the startup position. It looks like this:
https://datazap.me/u/tequilaboy/3-se...mark=5180-5164
https://datazap.me/u/tequilaboy/3-se...mark=5180-5164
