Looking to buy a used purge valve from a '87 Ford F350 w/460 non-injected motor. If you have a parts truck around and could spare a purge valve, email me. I tried local ford dealer and the parts guy didn't know what it was. Maybe I'll try another dealer. I broke a nipple off mine while changing water pump. I'll post this on classifieds also.
Thanks,
Tony

 

I'd like to know what a purge valve is also and what does it connect to and what does it purge? I may have a new one laying around in my spare parts bin!?!

'82 F150 2WD w/351W (orig 300 I6)
Slik

 

It is part of the emmission system that feeds fuel tank vapors into the carb. Ya know that lil plastic carbon filled canister that hangs on the frame and under the engine. That apparently absorbs fuel tank vapors when the engine is off. When the engine heats up or is running, the purge valve opens to allow accumulated vapors to enter the engine. When the engine isn't running, it shuts so that fuel tank vapors don't "escape" into the atmosphere. On my engine, the valve looks like it has 5 vaccum hose nipples on one side and 4 on the other side. It is located on the front left side of the engine, somewhat behind the alternator and rubs against the heater hose coming from the water pump. It connects off a hose that runs between the carbon filter box and the area of the top of the motor.
Thanks for checkin.....
Tony
The Haynes Manual that I have has a picture of it on page 6-3. My pickup is dieseling almost every time I shut it off and this is most definately a possible culprit as the vapors to the carb are not being shut off.

 

When I redid my engine, I tried to figure mine out. I think it had three valves; one was a simple inline valve that I'm not sure how it was controlled. It may have been a one way valve to prevent any fuel from running from the carberator into the carbon can, the other valves were controled by vacuum, one to a temperature switch to keep the line closed during warmup, and one to a straight vacuum, I assume to close the line during hard acceleration. I just put the vacuum switch back in and it worked fine. I just removed my can this week to try and clean up the engine bay. Do you know of any side affects this would cause?

'82 F150 2WD w/351W (orig 300 I6)
Slik

 

>It may
>have been a one way
>valve to prevent any fuel
>from running from the carberator
>into the carbon can,
I think this is the heat sensetive valve that opens after warmup...The manual a heat sensetive valve directly below the carb inline with the large hose coming from the canister.

the
>other valves were controled by
>vacuum, one to a temperature
>switch to keep the line
>closed during warmup, and one
>to a straight vacuum, I
>assume to close the line
>during hard acceleration. I
>just put the vacuum switch
>back in and it worked
>fine. I just removed
>my can this week to
>try and clean up the
>engine bay. Do you
>know of any side affects
>this would cause?

I'm not a mechanic, but I don't think there would be any side effects. The purpose is to give the fuel tank fumes a place to collect when the motor is not running and burning those fumes. Theoretically, if you vent those fumes to the outside, you might get minutely less fuel economy. If you plug the line from the fuel tank, you might create some slight pressure buildup in the tank. I don't think either would be significant, but like I say, I'm not a mechanic or engine designer.
Tony G

>
>'82 F150 2WD w/351W (orig 300
>I6)
>Slik

 

Hey Tony,
If I haven't already scrapped it, I should have one. I swapped a newer 460 into my 79 f150 about 7 years ago. I pulled off all the emissions equipment and threw it in a box. I should also have one from an 86 302. I'll look for it tommorow and let you know.

Later,
Jon