[Gmecm] IAC control??

[Jim Sloan]

 Where can I access the "747 IAC Control" document?

Thanks.
Jim 

> -----Original Message-----
> From: gmecm-bounces at diy-efi.org 
> [mailto:gmecm-bounces at diy-efi.org] On Behalf Of David Haggard
> Sent: Friday, June 10, 2005 9:28 AM
> To: gmecm at diy-efi.org
> Subject: RE: [Gmecm] IAC control??
> 
> Here's a possibility. 
> 
> If you have changed the "IAC steps vs. Coolant temp" table 
> (controls cold-engine IAC settings), there is another couple 
> of settings that can make it "hang" or speed up. I had this 
> same issue myself, and found the answer.
> 
> If you have lowered the settings in that table, then you 
> might also need to lower the "Kickdown steps."
> 
> >From the document "747 IAC Control"--
> <quote>
> 	0x5D7: Kickdown delay timer value (seconds).
> 	0x5D8: Kickdown steps.
> 
> 	These two together form a post-startup rpm reduction. 
> 	The kickdown delay timer starts right after startup. 
> 	Once the timer has expired, the IAC is extended by
> 	the amount of kickdown steps.
> 
> 	A nuance: The kickdown steps must be less than the
> 	steps used in the IAC position vs. coolant table
> 	value (0x5F5): Otherwise kickup will occur. The 
> 	kickdown steps are subtracted from the IAC position
> 	steps, and are added to a term that is decayed out.
> <end quote>
> 
> When in diagnostic mode, I think these settings are ignored, 
> and would allow normal operation.
>