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Message: <blockquote data-quote="2011reptar" data-source="post: 2074430" data-attributes="member: 75991">*Updated 11/12/24*Hello everyone! I’m Jay. Apologies for the very long first post. My Raptor is a 2011 6.2 with 110k. Bought from the original owner with full service records showing 6k oil change intervals and all suggested maintenance performed. Literally does not have a single scratch on it.I am having an issue that I just can’t figure out. I have Forscan and am somewhat mechanically inclined having built 351W and LS motors in the past.Symptoms:1. W/ AC off. Non steady idle in park. Can see tach needle moving and Forscan shows 575-635rpm fluctuation and can feel the cab shudder like it’s missing.2. Idle dips to 450rpm about every other time when put in park, almost stalls, then goes back to an unsteady 600rpm. To be clear, not when coming to a stop, specifically when putting it in park after a stop.3. Can hear occasional popping sound from driver side exhaust area when driving or at idle. Maybe excess unburnt fuel?Data:1. Forscan showing RPMs fluctuate between 580-640 at idle.2. Forscan showing long term fuel trims of -2, to -5 at idle.3. No DTC or other irregular info that I can see.What has been done so far:Fired the parts cannon full blast, all OEM parts from dealer. Changed 16 plugs, 8 coils, 8 wires, 8 injectors, MAF Sensor, purge canister, PCV Valve, air filter, throttle body, up stream 02 sensors. Put seafoam in crank case, used can of spray gumout foaming cleaner on intake for valves. Pulled valve cover to inspect valve springs and guides, checked for vacuum leaks and cracks in the intake and all looks great. Compression check turned out great, PCM relearn process performed a few times. Scoped cylinders, all looks fine. Additional information:No engine lights, no performance issues. Fuse 27 relocated. No MPG decreases. No ticking or knocking. I run 91 octane. Brought to two shops, first said it’s normal for the “aggressive cam profile of the Raptor,” the second said maybe dirty valves but they’re unsure.Need some help please!</blockquote>

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