IAC Pre Decay postion

A1C calibration can be modified and configured to operate all EFI-SD4x ECUs in 4 cylinder, 6 cylinder and 8 cylinder configurations.
Mikestang
Posts: 7
Joined: 2021 Mar 04, 09:59
Location: Firestone Colorado
Vehicle Information: 1981 Mustang Racecar
302
DA1 PCM, Moates QH, BE software

IAC Pre Decay postion

Unread post by Mikestang »

What scaler or table is controlling where the IAC is positioned when you start to decel, but haven't reached the decel decay rate yet? Does that make sense? I can see when driving and start to decel the IAC position is fixed at 70%, what setting can I change to get it to maybe pre-position around 50 or even 40%?

There is no Pre-Position Airmass in this Speed density pcm that I can find


Running DA1 from Derick, using BE to tune.
decipha
Posts: 4953
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'19 F-150 3.3L

Re: IAC Pre Decay postion

Unread post by decipha »

thats it fn882 the dashoot airmass and the pre position
Mikestang
Posts: 7
Joined: 2021 Mar 04, 09:59
Location: Firestone Colorado
Vehicle Information: 1981 Mustang Racecar
302
DA1 PCM, Moates QH, BE software

Re: IAC Pre Decay postion

Unread post by Mikestang »

There is no FN882 in my DA1 file
decipha
Posts: 4953
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'19 F-150 3.3L

Re: IAC Pre Decay postion

Unread post by decipha »

just search dashpot there should be a few variables there that function the same
Post Reply