PCV Valve port sucking
I have a 1997 Expedition, 4.6L Triton, 40k miles on rebuilt engine 2 years ago.
Experiencing a surging, rough idle, lack of power up hills, and poor automatic shifting. The Check Engine light is NOT on. Everything else appears normal. While checking for vacuum leaks, I found the PCV Valve (PCV Valve 2090) on the starboard valve cover has two ports, the lower larger one going to the intake manifold, and a smaller one above it un-connected. The upper port is sucking like there is no tomorrow. Thinking the cap might have come off some how, I capped it, but that causes the engine to stall. I replaced the valve, no change, same problem.

Any help as to why this smaller port would be sucking wide open would be much appreciated.

Thanks, Thomas

 

I have a 2000 and where the pcv would normaly be its not changable but it does suck hard and i thought the ame thing about capping it off but it trys to die so im not sure thats not the norm.

 

Replace the PVC Valve Hose Assembly for about $30.00. It cracks at the elbow, which is located on the rear of the Intake Manifold. Ford Genuine Part # F75Z-6C324-JA.