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2006 F-550 intermittent no ICP

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robp823
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robp823

robp823

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started out being a no start hot.Found rail dummy plugs o rings were bad.Replaced both dummy plugs and stand pipes with updated ones.Got running and started back up hot no problems.Thought problem was solved,no.Guy calls me up and says its doing it again.Go and get truck and drive it over to the shop.Started back up hot again.Pressure tested ICP system commanding ipr to 90 percent.No leaks heard.I started thinking possible ipr going bad.Installed test ipr.Drove it back to customers house.Shut it off.Tried refiring,nothing.Watching ICP it would only build 32 psi.Now I'm thinking the pump is on the way out.Before I condem a pump though I wanted your guys input.Is it possible for an stc fitting to cause intermittent no ICP?

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