PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Won’t start while hot

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Old Sep 28, 2025 | 08:30 PM
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upsetdon's Avatar
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Default Won’t start while hot

Hey guys new here,
So i’m just getting my build running i have a twin turbo 5.3 on a terminator X

Im having trouble with my car wanting to die out and not idle when it’s cold it starts up find idles fine but if i shut it off when it’s at temperature and i try to restart it it won’t start it just sputters and dies out, im pretty sure it has something to do with the tune
Im on the base tune with my specifications i haven’t changed anything with the idle or fueling besides me having it running on e85. i put in all the information for my sensors, map (3 bar) oil pressure ect




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Old Sep 28, 2025 | 09:29 PM
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Did you adjust fuelng for the e85?
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Old Sep 29, 2025 | 01:14 AM
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It could be any number of things.

Without a tune/log, we are just guessing.
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Old Sep 29, 2025 | 11:54 AM
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So you are on the base tune and haven't changed anything yet? Yeah, you need to actually tune it.
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Old Sep 29, 2025 | 01:01 PM
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Default Kinda

Originally Posted by NicD
So you are on the base tune and haven't changed anything yet? Yeah, you need to actually tune it.
I did change some things.. i changed the idle speed i also changed it to run on e85 lol i have no experience with tuning with a holley and im trying to learn to software and what i can do to make it start and run so i can send logs to a tuner
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