High IAC #

[CapeGN]

Hello All,
I recently installed my scanmaster 2.1 in my 87 GN and I'm having an issue with my IAC#.
With the car warmed up in park/idle I can't get the IAC# under 52?
I tried adjusting the set-screw, but the lowest # I can get is still 52.
Is there anything that can be causing this? Vac Leak, etc...
Any info or suggestions will be greatly appreciated!

Henry

 

[turbojd]

You could try this IAC Reset Procedure

 

[CapeGN]

Turbojd,
Thanks for the info/link! I'll try it and see what happens!

Henry

 

[CapeGN]

Sorry for the delayed post & thanks for all the info!!
I reset the IAC and was able to get it down to 19 with 675-700 idle.
Is this too low?
The only issue I have left is with the TPS setting.
I have it set at .42, but can only get 4.30 at WOT.
I was told that the TPS has to reach a 4.50 minimum for full fuel enrich?

Thanks,
Henry

 

[daily driver]

19 is not too low for a warmed up car after the IAC and TPS reset procedures are completed.

 

[turbojd]

Most GN's warm at idle will fall between 10 and 30, so your fine at 19. Also make sure your floor mat is not in the way when checking WOT readings. I would leave the tps right where it is, the car will go into power enrichment mode around 3.75.