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2005 F-150 PCV Characteristics

I have a 2005 F-150 with 100K miles. I have never chanced the PCV and when I went to get one no one in town has one. I dont know for sure if it's bad but the truck is running like crap! The plugs are fairly new, the air filter has been changed recently and the fuel filter is new. A while back it started surging at idel speeds a little bit only in drive like going through a parking lot or backing up. Now it wont hardly idle without stalling. I took the PCV out and really dont see the purpose of it. I can blow through it both ways with no restriction. Is this normal? And it rattles. If you guys can't help me I guess Ill have to put it in the shop. Im gonna be limpin from Christmas for awhile and dont need any more debt. Thanks in advance.

Reply to
Thunder
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"Thunder" schrieb im Newsbeitrag news: snipped-for-privacy@c1g2000yqg.googlegroups.com...

The PCV acts like a one way valve and normal you should can blow only in one-way.

Reply to
Ralf Ballis

A Positive Crankcase Ventilation valve is not a one way valve. At low vacuum it has a relatively large opening and at high vacuum a plunger moves to restrict it to a smaller opening. The idea is to maintain a constant flow regardless of vacuum. The fact that it rattles means the plunger is not gummed up. A PCV valve will last the life of the vehicle if it is cleaned with carburetor/fuel system cleaner on a regular schedule e.g. at each oil change.

Reply to
Mike Walsh

Thunder wrote in news:9361234e-0132-4b28-9998- snipped-for-privacy@c1g2000yqg.googlegroups.com:

take pcv hose off at base of throttle body and inspect. i find most of the hose assys. are leaking vac. at the bend....dealer will sell you hose and valve as assy.....take vin w/you.....and yes, it makes them run like crap. many times w/out cel coming on...........................

Reply to
bill

Clean the PCV valve, put it back in, and start looking for vacuum leaks.

--scott

Reply to
Scott Dorsey

Reply to
man of machines

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