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.
red5.0fogger
Posts: 183
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Location: Newington CT
Vehicle Information: 1986 Mustang GT, Stock block, TFS 170 Heads , N41 cam, ported cobra intake, nitrous, T5 , 3.73s

Re: Startup enrichment trouble from heat soak

Unread post by red5.0fogger »

Maybe get it hot and smoke test for an oddball leak in the piping or intake?
decipha
Posts: 6384
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Location: Metairie, LA
Vehicle Information: Work Truck
'25 F-150 5L

Re: Startup enrichment trouble from heat soak

Unread post by decipha »

that's two different temps 204 vs 184

both look to be lean and need more fuel as the engine doesn't seem to settle
PaulC-turbo5.0
Posts: 129
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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 »

Can you try to elaborate more on why you say that? I know the second one is lean that’s the problem I’m just trying to fix. But I’m not sure what you’re seeing in the log of the first that I’m not picking up on in the log or in person?
decipha
Posts: 6384
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 »

with more fuel the idle should be more stable, the engine doesn't look like its happy as the rpm's are jumping around

regardless you can command any enrichment you want for 184 vs 204 degrees as the two are completely different. You can see a few seconds after fire off the ect's plummet on the one log.
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