turbo cutting out - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 12-16-2011, 06:32 AM Thread Starter
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turbo cutting out

running a 07 E 350 6.0 while driving at highway speeds everything in fine except when climbing a hill it cuts into overdrive (approx 3200 rpm's) it will work for a couple secs and then the turbo will cut out but the engine will still work at reduced power, when at the top of the hill slip the trans in neutral turn off the engine and restart it and everything works fine again tell next time. do anyone have any ideas to what is going on.
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post #2 of 2 Old 12-20-2011, 05:34 PM
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My first guess would be an compressed air leak in the induction system down stream of the turbo. The turbo makes boost but doesn't get enough pressure in the manifold because of the leak and the downstream pressure sensor puts the engine in default mode. The switch off-on resets the engine to normal mode and it runs again until the pressure leaks out.

I'd check any rubber hoses or joints in the system. Look for a wet area where the air-fuel mixture has been blowing out. Had exactly this happen with a Sprinter with a nearly invisible split in a rubber tube. Three layers of duct tape and four hose clamps edge to edge got it home. BTW, in that case the turbo would surge noticeably before it finally would go into default mode.

I'd particularly look at that short hose to the intake manifold that's right in the front of the engine.

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