I have a failure on the evap system of my 2002 Escape, and need the proper testing procedure for this particular purge valve. I was able to fix the purge valve on my 2013 Explorer, with no issue, but the Escape has a different type and I'm not sure I'm testing it properly. I want to verify the purge valve is working properly instead of just throwing parts into it. I know it is likely either the valve or the gas cap, but it could be something other than those two items, so I want to get the simple stuff checked out first.

 

What's the code?

 

Interestingly enough, I have not had an evap code, until I pulled the electrical connector and activated the key switch (got a p0443). So the code doesn't really matter in this case, my evap monitor will not set, and the evap test on my scanner fails the test. I have also been getting lean readings on the O2s, and I'm certain the purge solenoid is not opening...it's not responding to any electrical input, and it Ohms out fine, but if it's not opening, this could contribute to the lean readings.

I just wanted to know how to test the solenoid itself, and details on how it functions. I believe it should hold vacuum on all ports. I'm not getting a vacuum to hold on the vacuum input port. I disassembled the entire valve, and there appears to be something missing, like a moving part to open the port.

In any event, I have ordered a new part to replace this one, and also replaced some of the worn rubber hoses to the canister. I may yet have to replace the gas cap, or some other component.

 

It is often incredibly difficult to get the EVAP monitor to run. You'd do best to simply leave it alone as most jurisdictions do allow one incomplete during e-tests.

The "evap test" on your scanner likely isn't supported properly so it won't run. Pretty common for vehicles of that era and aftermarket scan tools.