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railer

diesel 7.3

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when at start up warming up the motor you hear a hiss out of the exhaust on off on off ,and at the bottom of the turbo there is a rod moving back and forth making that hiss not the top one . after its all warmed up it stops , my other 7.3 doesn't do that ,now you can drive it and you can feel that on -off on off feeling till it warms up ,,any thoughts ?

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My guess is the EBPV... (exhaust Backflow pressure valve)

I'm pretty sure you can just unplug it and see if it goes away. It will take a lot longer to warm up tho

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