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My 7.3 will run down the road normally then bogs down to 40 mph and acts like it is starving for fuel. Then after four or five minutes will recover until it does it again in about five minutes.

Have changed the fuel filter (top of engine), air filter, and cam sensor. Is there another fuel filter, or what should we be looking for?
 

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Welcome to the forum!

Does it do it on both fuel tanks? I would also see what the fuel pressure is (you can measure it at the shrader valve on the driver's side of the fuel bowl. Sometimes it is necessary to measure it with the engine under load to see if the pressure drops significantly. You would need a hose long enough to get the gauge out to the windshield so you can see while driving. With the shrader valve removed, the port is a 1/8 NPT. Don't tighten a fitting too much as the housing can easily crack. Cheers!
 

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The pump is in the valley behind the filter housing near the turbo.

When you have problems do you hear a whooshing sound or is it just dead? Does it chug like there is no fuel when it happens?
 

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Bugman's insight is probably a more likely scenario. Your Exhaust Back Pressure Valve (EBPV), a big butterfly valve in the exhaust on the turbo outlet could be activating and causing your intermittent power loss. The valve is activated using engine oil pressure when the PCM commands it to close. The is a 2-wire weatherpack wiring connection at the base of the turbo on the driver's side that can be disconnected to disable the solenoid that activates it. You can try that and see if the problem goes away. Cheers!
 
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