Bronco lost power on an obstacle

[Eric L]

Ok...this is a longshot. I was rockcrawling in Vernal 2 weeks ago, locked up, on a steep obstacle and my bronco had no power. I had it floored and nothing. Had to winch up. No check engine light and drove home under power just fine. The only thing I changed from the last time out was I had an ARB airlocker installed in the Dana 60 rear end. Not sure if there is any causation there or not. Someone said maybe cam phasers? The dealership couldn't figure it out. They said one of my portals was locked up which wasn't true. Any ideas?

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[Ducati1098]

I know you said no check engine light, but did the dealer check for, or note any historical codes?

Doesn’t sound like phasers at all, more like potentially a throttle control issue if it was still running. Although that would typically set a check engine light right away.