1994 F150 4.9 PCV Valve Question
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1994 F150 4.9 PCV Valve Question
Hey what's up everyone, I just bought a 1994 Ford F-150 4.9l with ~138000 miles and I have some work to do on it. I plan on using it as my daily driver and to tow a small trailer with landscaping equipment. I bought it knowing I would have a couple of gasket jobs to do on it and any other maintenance that needs to be done. I have minimal mechanical knowledge, but my previous two vehicles taught me a lot (valve covers, trans pan, drum brakes, belt, fluid changes, etc.).
Anyways, the PO said the truck had been sitting for a month and wouldn't start. They weren't sure what was wrong and after replacing a bunch of ignition related parts they finally replaced the computer and it worked. So I test drove it and the truck drove great. Today, I started it and after idling for about 3 minutes the idle surged a bit and then stalled. I pulled off the PCV valve and saw a plastics piece (see picture) had cracked off and must of fell down into the valve cover. It looks like the original PCV valve so I'm not sure if this happened recently or what, it also doesn't rattle at all.
So I was going to replace it along with the hose, but as you can see my PCV valve has just a single hose connection that turns 90 degrees and connects into the PCV grommet. All of the PCV valves I've seen at advance auto, autozone, and oreillys have two hose connections coming from them (I'll include a picture). However, while searching online I noticed that the 5.0L engines have the PCV valve with just the single hose connector coming off of the valve like mine. Is it ok to use the PCV valve for the 5.0L on my 4.9L engine?
Anyways, the PO said the truck had been sitting for a month and wouldn't start. They weren't sure what was wrong and after replacing a bunch of ignition related parts they finally replaced the computer and it worked. So I test drove it and the truck drove great. Today, I started it and after idling for about 3 minutes the idle surged a bit and then stalled. I pulled off the PCV valve and saw a plastics piece (see picture) had cracked off and must of fell down into the valve cover. It looks like the original PCV valve so I'm not sure if this happened recently or what, it also doesn't rattle at all.
So I was going to replace it along with the hose, but as you can see my PCV valve has just a single hose connection that turns 90 degrees and connects into the PCV grommet. All of the PCV valves I've seen at advance auto, autozone, and oreillys have two hose connections coming from them (I'll include a picture). However, while searching online I noticed that the 5.0L engines have the PCV valve with just the single hose connector coming off of the valve like mine. Is it ok to use the PCV valve for the 5.0L on my 4.9L engine?
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As I recall when I did mine, you break off the tab between the two hose extensions and use the attached plug on the top extension. Problem solved.
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#8
On a 4.9L engine the PCV is located on the passenger side of the engine on one of the intake runners.
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Ford had a fan blowing on the fuel rail at some point in time. Your fan is gone or it never had one. Best guess on that plug at the moment.
#13
Most PCV valves are universal in nature meaning they fit various vehicles over a span of years. When you see dual ports like that it's usually a vacuum tie point. Therefore it eliminates another tee fiting.
Ford had a fan blowing on the fuel rail at some point in time. Your fan is gone or it never had one. Best guess on that plug at the moment.
Ford had a fan blowing on the fuel rail at some point in time. Your fan is gone or it never had one. Best guess on that plug at the moment.
#14
leaked oil moves backwards. Your VCG is leaking so bad it has accumulated there. Any leaks on the floor can be caused by the excess oil going backwards or other oil from other VCG or other areas. Fix that and then if you still have leaks, clean it all up underneath and start fixing. Felpro gaskets work very well IMHO. In Texas we fix everything. Fixing to go fishing. Fixing to eat etc. Regards Sandy
#15
On many vehicles the crankcase has some pressure under load. The oil is pushed out along the gaskets, valve cover, breather, etc. Replace the PCV and gasket you will see if the pressure remains. Which means blow-by passed the rings.