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2008 sounds like air hose upon acceleration

985 views 1 reply 2 participants last post by  diode_ee 
#1 ·
2008 F450 sounds like an air hose next to it when accelerating. the harder you accelerate the more the sound. If i didnt know better it sounds like a small hole in the exhaust or restricted. It has a dpf delete and a straight pipe from the front to rear. Im lost and need some other ideas. thanks and HELP
 
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