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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 06-30-2009
MFOX's Avatar
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has this happened to anyone?

last night, for the THIRD time, my ranger has blown the PCV hose off the intake manifold on start up. I crank the truck and I get a loud pop and nothing, crank again andit starts,but of course lopes like it has a race cam. It took me 2 days to figure out what it was the first time. why does it keep doing this?
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Old 06-30-2009
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Sounds to me like the PCV is plugged.

As your pistons move up/down and the engine is running.. you need to have a slight vacuum on the crankcase. At times there can be positive pressure too.

Rich
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