locked timing and DESMAF_PID_N

Decipha's custom GUFX strategy covers all 89-93 foxbody ecu's including the 88 mass-air california ecus.
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danielt
Posts: 9
Joined: 2021 Mar 16, 22:26
Location: McKinney, TX
Vehicle Information: 1990 Ford Mustang 5.0LX Convertible
5-speed, stock drivetrain

locked timing and DESMAF_PID_N

Unread post by danielt »

Once into a warm stable idle, timing seems locked at 20 deg and only ISC is responding to control idle. Also, no matter how I adjust ITHBMA, DESMAF_PID_N is always 0. I should be using the default patches in A9L2, so should be using the expanded spark FN841XX to adjust timing with RPM delta. Any guidance or direction appreciated.
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A9L2_20251019_3.bin
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short drive.xdl
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decipha
Posts: 6416
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'25 F-150 5L

Re: locked timing and DESMAF_PID_N

Unread post by decipha »

is the closed throttle flag being set?
danielt
Posts: 9
Joined: 2021 Mar 16, 22:26
Location: McKinney, TX
Vehicle Information: 1990 Ford Mustang 5.0LX Convertible
5-speed, stock drivetrain

Re: locked timing and DESMAF_PID_N

Unread post by danielt »

Yes, it is -1. i set TRLOAD to 0 and now it works. Still trying to figure out if I should set to 0 or 1
danielt
Posts: 9
Joined: 2021 Mar 16, 22:26
Location: McKinney, TX
Vehicle Information: 1990 Ford Mustang 5.0LX Convertible
5-speed, stock drivetrain

Re: locked timing and DESMAF_PID_N

Unread post by danielt »

I'm trying to figure out why crank spark is at 0. SPK_UNDSP is set at 10.
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20251025 warm start.xdl
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A9L2_20251024.bin
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