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Message: [QUOTE="ghohouston, post: 687273, member: 9421"] Every 7.3 ive diagnosed and worked on thar has had fuel in the coolant resovoir, has ended up being injector cups. As stated, pull injectors, pressureize your coolant system to 15lbs, get a flashlight and mirror, get a bottle of soapy water and spray each cup (the soapy water will cause bubbles to form where the leak is, kind of like finding a hole in a tire) if its not immediatley obvious which cup is leaking. They usually crack, but this last week, I had one that actually had a pin hole in it, and had a steady stream when pressured up [/QUOTE]

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