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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
New spark plugs fix backfiring issue?
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<blockquote data-quote="Jaymare404" data-source="post: 1815520" data-attributes="member: 53087"><p>No tune... but they were gapped iridium and most measured in that range. They were SP-550 plugs so they are the factory heat range too. It runs SOO much better now. No hesitation and no misfires. It also feels like it has more spunk too, but that may just be the placebo effect, or my butt dyno may need recalibration. </p><p></p><p>But I definitely agree about the gap being way off! i dont even know what those old plugs were recommended for. They were champion iridium 9901. Im guessing... and this is just a guess... but they were for 3.5L v6 NON turbo engines. </p><p></p><p>I havent put the truck through its paces yet with the new plugs, but i will be this weekend when i pull our camper to ohio for a weekend camping trip. Ill report back on the trip after.</p></blockquote><p></p>
[QUOTE="Jaymare404, post: 1815520, member: 53087"] No tune... but they were gapped iridium and most measured in that range. They were SP-550 plugs so they are the factory heat range too. It runs SOO much better now. No hesitation and no misfires. It also feels like it has more spunk too, but that may just be the placebo effect, or my butt dyno may need recalibration. But I definitely agree about the gap being way off! i dont even know what those old plugs were recommended for. They were champion iridium 9901. Im guessing... and this is just a guess... but they were for 3.5L v6 NON turbo engines. I havent put the truck through its paces yet with the new plugs, but i will be this weekend when i pull our camper to ohio for a weekend camping trip. Ill report back on the trip after. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
New spark plugs fix backfiring issue?
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