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2016 3.5 Ecoboost - P0390 and P0394 codes come and go - occasionally low on power

190 Views 1 Reply 2 Participants Last post by  Boatwaco
Need to see if anyone has had these codes comes up with occasional low power. Codes clear themselves after a couple days but will appear again the day after. No start up rattle noise, no stumbling at idle. From what I've found I'm leaning towards sticky VCT solenoids.
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