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Old 08-03-2016, 11:53 PM   #15
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1991 25' Excella
Stanfield , Oregon
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Posts: 269
Its unfortunate that the Cummins dealer is incompetent. But the issue has nothing to do with the LPG it is a condition of internal blow-buy and use. Personally I would find a different shop to service your coach. Now as far as the throttle body goes a good cleaning a new air filter and and a pcv valve should fit it.

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Old 08-04-2016, 11:33 AM   #16
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2011 Interstate Coach
Overland Park , Kansas
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Originally Posted by kupchu9702 View Post
I hate to show my ignorance, but what is a pcv valve?
Positive Crankcase Ventilation- Started back in the 60s where they allowed the intake to suck a partial vacuum on the crankcase (usually thru a valve cover back in the day) to remove and burn blow-by gases. The PCV valve was usually stuck in the valve cover and connected to the intake manifold w/ a hose. There was another pipe or hose that was usually connected to the air cleaner and the crankcase (usually via the other valve cover) to allow filtered air to be drawn into the crankcase. Today's engines are different in that some use an orifice instead of a valve and there's probably other differences that I'm not aware of since my shadetree days on newer vehicles are behing me.

Glass half full or half empty to an engineer is simply a glass that was over designed.

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