Ok, thanks for the reply.
Well, that's not good. We should have been able to find a reason for that code .
Was there a lot of dust in there ?
Dust + Rain = mud.
That might have caused the vent to plug up. If you've blown it clear, maybe the best approach will be to clear codes and run it for awhile. You will need a couple of days of cold starting and some roadtesting for the obd2 monitors to complete again. If the code doesn't come back, great.
So, I'll reinterate what I tried to explain before. This system checks the function of its parts by applying a vacuum signal into the evap system. If everything is ok, the vacuum should not be able to build. The solenoid and cannister you blew out should allow air in to prevent vacuum from building up in the tank. It goes on to do other tests , but I'll leave that for now.
If it does come back , well......
With the equipment you have at your disposal, we are going to run into trouble. You should really run the KEY ON ENGINE OFF and the ENGINE RUNNING SELF TESTS.
There is a pressure sensor on the fuel tank that determines tank pressure. If you had an Enhanced Ford scantool we could test that. It'll be pretty hard to test without that.
Hook up your scanner and see if it shows FUEL TANK PRESSURE sensor in the data list. If it does, get me the value displayed. It should be around 2.3- 2.7 volts with the gas tank open to atmosphere. The voltage drops when vacuum is applied to the system. If the voltage goes low at the wrong time, you get the P0446.
This could also be caused by a bad tank pressure sensor or wiring.
You'll see that this is on the list of suspects on the pinpoint test I sent you earlier today. You may wish to print that chart out and go over it to see if you can see anything else out of place.
Know anyone that's got one of these scantools? Do you deal with a repair shop ? A snapon or otc scanner would do it.
If you have a notebook pc, you might want to look at this one. You would need the basic obd2 plus the enhanced Ford kit.
I'm not trying to sell you anything...I'm just making you aware of options.
Sorry for the delay in the replies. It takes a bit of time for me to put these replies together.