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Old 05-05-2013, 06:05 PM
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boost problem

Have a 2002 7.3. Had to put a new remanufactured engine from ford. Runs great on the road but the minute you step on it the boost is lost and blowback smoke. Been ford for a week reticent seem to find the problem any suggestions
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Old 05-05-2013, 07:30 PM
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Bad turbo, Super dirty air filter, bad boost leak, EBPV stuck closed, the list is pretty endless until some stuff is ruled out
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Old 05-06-2013, 05:58 AM
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boost problem

Ford put a new turbo on didn't change problem. Has a K&N filter that was dirty cleaned it and started working but soon went right back to no boost ford techs can't even come up with a solution motor has about 1200 miles on it.
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Old 05-06-2013, 06:29 AM
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Sounds like your ford dealer sucks and are just throwing parts at it. Go somewhere else who knows about the 7.3L. Lack of boost is pretty easy to trace down. Do you even have a boost gauge?

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Old 05-06-2013, 07:00 AM
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No boost gage but they have hooked one up and drove it showed boost and when it was lost
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Old 05-06-2013, 09:33 AM
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There are only a handful of places you will leak boost or drive pressure. Pressurize the intake system and spray soapy water on all connections. Look for soot on the up-pipes as well.
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Old 05-06-2013, 07:12 PM
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Get yourself a piece of PVC pipe and reducers to hook up an air hose. Then pull your main intake hose off after the filter and put about 40 psi to it (turn your air compressor regulator down to 40psi to do this). Shouldnt need any more than that.

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