Startup enrichment trouble from heat soak

Decipha's custom GUFX strategy covers all 89-93 foxbody ecu's including the 88 mass-air california ecus.
decipha
Posts: 6296
Joined: 2021 Feb 15, 12:23
Location: Metairie, LA
Vehicle Information: Work Truck
'25 F-150 5L

Re: Startup enrichment trouble from heat soak

Unread post by decipha »

no , should be no more than about .1 less than fn875 for your idle rpm

not uncommon but so long as its not a major correction
PaulC-turbo5.0
Posts: 118
Joined: 2021 Feb 15, 21:56
Location: Lancaster New York
Vehicle Information: 1989 fox GT convertible
5.0 stock block, E7 heads, stock cam
Explorer GT40 intake flipped to driver side inlet
Single 67mm On3 BB turbo
Flipped JBA headers, custom SS 2.5" hotside built by me
custom 3" coldside thru On3 intercooler
tuning with Moates QH + TPRT
Dechipa's GUFX and supporting files, couldnt have tuned it myself without him!

Re: Startup enrichment trouble from heat soak

Unread post by PaulC-turbo5.0 »

Fn875 is set to 1.00

Reading the parameter comments on Ithbma I converted the maf flow at idle from kg/hr to lbs/min and came up with .918, so that’s what I set it to. Does that sound right?

What effect will this have? Because I’ve run this car for years with it set at zero? lol
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