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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
2018 with PRX93 tune engine stuttering at altitude
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<blockquote data-quote="TwizzleStix" data-source="post: 1865081" data-attributes="member: 32095"><p>Without data logs, guesses are the best you’ll get. With the misfire event it could be the plugs/gap. If running 91 on the MPT 93 tune, I recommend NOT pushing it, AT ALL. Set the cruise and let it work. At altitude the turbos must work harder to meet the tuned higher Load/Torque targets, so the boosted air temps run hotter, so the cylinders are more prone to knock and misfire.</p></blockquote><p></p>
[QUOTE="TwizzleStix, post: 1865081, member: 32095"] Without data logs, guesses are the best you’ll get. With the misfire event it could be the plugs/gap. If running 91 on the MPT 93 tune, I recommend NOT pushing it, AT ALL. Set the cruise and let it work. At altitude the turbos must work harder to meet the tuned higher Load/Torque targets, so the boosted air temps run hotter, so the cylinders are more prone to knock and misfire. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
2018 with PRX93 tune engine stuttering at altitude
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