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Power Strokes
6.4 Tech
Harmonic Noise
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[QUOTE="08BIGRIG, post: 629347, member: 3985"] If there is anything touching a hpf line, you will have that noise. I had it for a little while and I found the issue this past week. The issue was right where you are having the issue. I took out my downpipe and bent the heat shelid up a little bit more and then saw that in my build we missed the clamp on the duel fueler that is fastened to the back of the intake manifold. I put a fuel line clamp on the back of the manifold and installed the line. Reinstalled the heatsheild and downpipe, and all is good now. Cant even tell that there is a duel fueler on the truck at all. But just the smallest amount of hpf line touching something makes a lot of noise. [/QUOTE]
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