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International Automotive Technicians Network
Re: 2005 Ford F-550 6.0 intermittent sag/no power
Posted to HD/Fleet Forum on 10/19/2014

Hello,

I may be crazy, but check to see if this truck has a catalytic converter. Smack it with a plastic hammer and see if it rattles. Unhook the exhaust before the cat and drive the truck. A loose converter element can rotate and completely block exhaust fl... Login to read more.